Whakaoti mō x
x=5
Graph
Tohaina
Kua tāruatia ki te papatopenga
3x+25x-20=120
Whakamahia te āhuatanga tohatoha hei whakarea te 5 ki te 5x-4.
28x-20=120
Pahekotia te 3x me 25x, ka 28x.
28x=120+20
Me tāpiri te 20 ki ngā taha e rua.
28x=140
Tāpirihia te 120 ki te 20, ka 140.
x=\frac{140}{28}
Whakawehea ngā taha e rua ki te 28.
x=5
Whakawehea te 140 ki te 28, kia riro ko 5.
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