Whakaoti mō y
y=\frac{2}{21}\approx 0.095238095
Graph
Tohaina
Kua tāruatia ki te papatopenga
25y-30=4\left(y-7\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 5 ki te 5y-6.
25y-30=4y-28
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te y-7.
25y-30-4y=-28
Tangohia te 4y mai i ngā taha e rua.
21y-30=-28
Pahekotia te 25y me -4y, ka 21y.
21y=-28+30
Me tāpiri te 30 ki ngā taha e rua.
21y=2
Tāpirihia te -28 ki te 30, ka 2.
y=\frac{2}{21}
Whakawehea ngā taha e rua ki te 21.
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
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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
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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}