Whakaoti i te {l}{y=x+6}{y=2-3x}

$$\left. \begin{array} { l } { y = x + 6 } \\ { y = 2 - 3 x } \end{array} \right.$$

Whakaoti mō y, x

$$x=-1$$

$$y=5$$

Ngā Upane e Whakamahi ana i te Whakakapinga

Whakaarohia te whārite tuatahi. Tangohia te x mai i ngā taha e rua.

$$y-x=6$$

Whakaarohia te whārite tuarua. Me tāpiri te 3x ki ngā taha e rua.

$$y+3x=2$$

Hei whakaoti i ētahi whārite takirua mā te whakakapinga, me whakaoti tētahi whārite i te tuatahi mō tētahi o ngā taurangi. Ka whakakapi i te otinga mō taua taurangi ki tērā o ngā whārite.

$$y-x=6,y+3x=2$$

Kōwhiria tētahi o ngā whārite ka whakaotia mō te y mā te wehe i te y i te taha mauī o te tohu ōrite.

$$y-x=6$$

Me tāpiri x ki ngā taha e rua o te whārite.

$$y=x+6$$

Whakakapia te x+6 mō te y ki tērā atu whārite, y+3x=2.

$$x+6+3x=2$$

Tāpiri x ki te 3x.

$$4x+6=2$$

Me tango 6 mai i ngā taha e rua o te whārite.

$$4x=-4$$

Whakawehea ngā taha e rua ki te 4.

$$x=-1$$

Whakaurua te -1 mō x ki y=x+6. I te mea kotahi anake te taurangi kei te whārite i puta, ka taea e koe te whakaoti mō y hāngai tonu.

$$y=-1+6$$

Tāpiri 6 ki te -1.

$$y=5$$

Kua oti te pūnaha te whakatau.

$$y=5,x=-1$$

Ngā Upane e Whakamahi ana i Ngā Poukapa

Whakaarohia te whārite tuatahi. Tangohia te x mai i ngā taha e rua.

$$y-x=6$$

Whakaarohia te whārite tuarua. Me tāpiri te 3x ki ngā taha e rua.

$$y+3x=2$$

Tuhia ngā whārite ki te tānga ngahuru ka whakamahi i ngā poukapa hei whakaoti i te pūnaha o ngā whārite.

$$y-x=6,y+3x=2$$

Tuhia ngā whārite ki te tikanga tātai poukapa.

$$\left(\begin{matrix}1&-1\\1&3\end{matrix}\right)\left(\begin{matrix}y\\x\end{matrix}\right)=\left(\begin{matrix}6\\2\end{matrix}\right)$$

Whakarea mauī i te whārite ki te poukapa kōaro o \left(\begin{matrix}1&-1\\1&3\end{matrix}\right).

$$inverse(\left(\begin{matrix}1&-1\\1&3\end{matrix}\right))\left(\begin{matrix}1&-1\\1&3\end{matrix}\right)\left(\begin{matrix}y\\x\end{matrix}\right)=inverse(\left(\begin{matrix}1&-1\\1&3\end{matrix}\right))\left(\begin{matrix}6\\2\end{matrix}\right)$$

Ko te hua o tētahi poukapa me te kōaro ko te poukapa tuakiri.

$$\left(\begin{matrix}1&0\\0&1\end{matrix}\right)\left(\begin{matrix}y\\x\end{matrix}\right)=inverse(\left(\begin{matrix}1&-1\\1&3\end{matrix}\right))\left(\begin{matrix}6\\2\end{matrix}\right)$$

Whakareatia ngā poukapa kei te taha mauī o te tohu ōrite.

$$\left(\begin{matrix}y\\x\end{matrix}\right)=inverse(\left(\begin{matrix}1&-1\\1&3\end{matrix}\right))\left(\begin{matrix}6\\2\end{matrix}\right)$$

Mō te poukapa 2\times 2 \left(\begin{matrix}a&b\\c&d\end{matrix}\right), ko te \left(\begin{matrix}\frac{d}{ad-bc}&\frac{-b}{ad-bc}\\\frac{-c}{ad-bc}&\frac{a}{ad-bc}\end{matrix}\right) te poukapa kōaro, nō reira ka taea te tuhi anō te whārite poukapa hei rapanga whakarea poukapa.

$$\left(\begin{matrix}y\\x\end{matrix}\right)=\left(\begin{matrix}\frac{3}{3-\left(-1\right)}&-\frac{-1}{3-\left(-1\right)}\\-\frac{1}{3-\left(-1\right)}&\frac{1}{3-\left(-1\right)}\end{matrix}\right)\left(\begin{matrix}6\\2\end{matrix}\right)$$

Mahia ngā tātaitanga.

$$\left(\begin{matrix}y\\x\end{matrix}\right)=\left(\begin{matrix}\frac{3}{4}&\frac{1}{4}\\-\frac{1}{4}&\frac{1}{4}\end{matrix}\right)\left(\begin{matrix}6\\2\end{matrix}\right)$$

Whakareatia ngā poukapa.

$$\left(\begin{matrix}y\\x\end{matrix}\right)=\left(\begin{matrix}\frac{3}{4}\times 6+\frac{1}{4}\times 2\\-\frac{1}{4}\times 6+\frac{1}{4}\times 2\end{matrix}\right)$$

Mahia ngā tātaitanga.

$$\left(\begin{matrix}y\\x\end{matrix}\right)=\left(\begin{matrix}5\\-1\end{matrix}\right)$$

Tangohia ngā huānga poukapa y me x.

$$y=5,x=-1$$

Ngā Upane e Whakamahi i te Tangohanga

Whakaarohia te whārite tuatahi. Tangohia te x mai i ngā taha e rua.

$$y-x=6$$

Whakaarohia te whārite tuarua. Me tāpiri te 3x ki ngā taha e rua.

$$y+3x=2$$

Hei whakaoti mā te tangohanga, ko ngā tau whakarea o tētahi o ngā taurangi me mātua ōrite i ngā whārite e rua kia whakakorehia ai te taurangi ina tangohia tētahi whārite mai i tētahi atu.

$$y-x=6,y+3x=2$$

Me tango y+3x=2 mai i y-x=6 mā te tango i ngā kīanga tau ōrite i ia taha o te tohu ōrite.

$$y-y-x-3x=6-2$$

Tāpiri y ki te -y. Ka whakakore atu ngā kupu y me -y, ka toe he whārite me tētahi taurangi kotahi ka taea te whakaoti.

$$-x-3x=6-2$$

Tāpiri -x ki te -3x.

$$-4x=6-2$$

Tāpiri 6 ki te -2.

$$-4x=4$$

Whakawehea ngā taha e rua ki te -4.

$$x=-1$$

Whakaurua te -1 mō x ki y+3x=2. I te mea kotahi anake te taurangi kei te whārite i puta, ka taea e koe te whakaoti mō y hāngai tonu.

$$y+3\left(-1\right)=2$$

Whakareatia 3 ki te -1.

$$y-3=2$$

Me tāpiri 3 ki ngā taha e rua o te whārite.

$$y=5$$

Kua oti te pūnaha te whakatau.

$$y=5,x=-1$$