Whakaoti mō x
x=20
Graph
Tohaina
Kua tāruatia ki te papatopenga
30+8x+420-12x=370
Whakamahia te āhuatanga tohatoha hei whakarea te 12 ki te 35-x.
450+8x-12x=370
Tāpirihia te 30 ki te 420, ka 450.
450-4x=370
Pahekotia te 8x me -12x, ka -4x.
-4x=370-450
Tangohia te 450 mai i ngā taha e rua.
-4x=-80
Tangohia te 450 i te 370, ka -80.
x=\frac{-80}{-4}
Whakawehea ngā taha e rua ki te -4.
x=20
Whakawehea te -80 ki te -4, kia riro ko 20.
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