Whakaoti mō x
x=25
Graph
Tohaina
Kua tāruatia ki te papatopenga
72x+1200=\left(x+15\right)\times 75
Whakareatia te 15 ki te 80, ka 1200.
72x+1200=75x+1125
Whakamahia te āhuatanga tohatoha hei whakarea te x+15 ki te 75.
72x+1200-75x=1125
Tangohia te 75x mai i ngā taha e rua.
-3x+1200=1125
Pahekotia te 72x me -75x, ka -3x.
-3x=1125-1200
Tangohia te 1200 mai i ngā taha e rua.
-3x=-75
Tangohia te 1200 i te 1125, ka -75.
x=\frac{-75}{-3}
Whakawehea ngā taha e rua ki te -3.
x=25
Whakawehea te -75 ki te -3, kia riro ko 25.
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