Whakaoti mō x
x=2
Graph
Tohaina
Kua tāruatia ki te papatopenga
10x-20=x-2\left(7-3x\right)
Pahekotia te 7x me 3x, ka 10x.
10x-20=x-14+6x
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te 7-3x.
10x-20=7x-14
Pahekotia te x me 6x, ka 7x.
10x-20-7x=-14
Tangohia te 7x mai i ngā taha e rua.
3x-20=-14
Pahekotia te 10x me -7x, ka 3x.
3x=-14+20
Me tāpiri te 20 ki ngā taha e rua.
3x=6
Tāpirihia te -14 ki te 20, ka 6.
x=\frac{6}{3}
Whakawehea ngā taha e rua ki te 3.
x=2
Whakawehea te 6 ki te 3, kia riro ko 2.
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