Whakaoti mō x
x=40
Graph
Tohaina
Kua tāruatia ki te papatopenga
120-x=4\left(-x+60\right)
Tē taea kia ōrite te tāupe x ki 60 nā te kore tautuhi i te whakawehenga mā te kore. Whakareatia ngā taha e rua o te whārite ki te 2\left(-x+60\right).
120-x=-4x+240
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te -x+60.
120-x+4x=240
Me tāpiri te 4x ki ngā taha e rua.
120+3x=240
Pahekotia te -x me 4x, ka 3x.
3x=240-120
Tangohia te 120 mai i ngā taha e rua.
3x=120
Tangohia te 120 i te 240, ka 120.
x=\frac{120}{3}
Whakawehea ngā taha e rua ki te 3.
x=40
Whakawehea te 120 ki te 3, kia riro ko 40.
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