Whakaoti mō x
x=10
Graph
Tohaina
Kua tāruatia ki te papatopenga
2\left(15-x\right)=x
Me whakarea ngā taha e rua o te whārite ki te 10, arā, te tauraro pātahi he tino iti rawa te kitea o 5,10.
30-2x=x
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 15-x.
30-2x-x=0
Tangohia te x mai i ngā taha e rua.
30-3x=0
Pahekotia te -2x me -x, ka -3x.
-3x=-30
Tangohia te 30 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x=\frac{-30}{-3}
Whakawehea ngā taha e rua ki te -3.
x=10
Whakawehea te -30 ki te -3, kia riro ko 10.
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