Whakaoti mō a
a=5
Tohaina
Kua tāruatia ki te papatopenga
-a-\left(-7\right)=-2\left(4-a\right)
Hei kimi i te tauaro o a-7, kimihia te tauaro o ia taurangi.
-a+7=-2\left(4-a\right)
Ko te tauaro o -7 ko 7.
-a+7=-8+2a
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te 4-a.
-a+7-2a=-8
Tangohia te 2a mai i ngā taha e rua.
-3a+7=-8
Pahekotia te -a me -2a, ka -3a.
-3a=-8-7
Tangohia te 7 mai i ngā taha e rua.
-3a=-15
Tangohia te 7 i te -8, ka -15.
a=\frac{-15}{-3}
Whakawehea ngā taha e rua ki te -3.
a=5
Whakawehea te -15 ki te -3, kia riro ko 5.
Ngā Tauira
whārite tapawhā
{ x } ^ { 2 } - 4 x - 5 = 0
Āhuahanga
4 \sin \theta \cos \theta = 2 \sin \theta
whārite paerangi
y = 3x + 4
Arithmetic
699 * 533
Poukapa
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
whārite Simultaneous
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Whakarerekētanga
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Whakaurunga
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}