Whakaoti mō x
x=2
Graph
Tohaina
Kua tāruatia ki te papatopenga
20-2\left(2x-1\right)=7x
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.
20-4x+2=7x
Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te 2x-1.
22-4x=7x
Tāpirihia te 20 ki te 2, ka 22.
22-4x-7x=0
Tangohia te 7x mai i ngā taha e rua.
22-11x=0
Pahekotia te -4x me -7x, ka -11x.
-11x=-22
Tangohia te 22 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x=\frac{-22}{-11}
Whakawehea ngā taha e rua ki te -11.
x=2
Whakawehea te -22 ki te -11, kia riro ko 2.
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