Whakaoti mō y
y=200
Graph
Tohaina
Kua tāruatia ki te papatopenga
7\left(400+9y\right)-55y=4400
Whakareatia ngā taha e rua o te whārite ki te 11.
2800+63y-55y=4400
Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te 400+9y.
2800+8y=4400
Pahekotia te 63y me -55y, ka 8y.
8y=4400-2800
Tangohia te 2800 mai i ngā taha e rua.
8y=1600
Tangohia te 2800 i te 4400, ka 1600.
y=\frac{1600}{8}
Whakawehea ngā taha e rua ki te 8.
y=200
Whakawehea te 1600 ki te 8, kia riro ko 200.
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