Whakaoti mō x
x=10
Graph
Tohaina
Kua tāruatia ki te papatopenga
20x-5\left(x+2\right)=120+4\left(x-5\right)
Me whakarea ngā taha e rua o te whārite ki te 20, arā, te tauraro pātahi he tino iti rawa te kitea o 4,5.
20x-5x-10=120+4\left(x-5\right)
Whakamahia te āhuatanga tohatoha hei whakarea te -5 ki te x+2.
15x-10=120+4\left(x-5\right)
Pahekotia te 20x me -5x, ka 15x.
15x-10=120+4x-20
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te x-5.
15x-10=100+4x
Tangohia te 20 i te 120, ka 100.
15x-10-4x=100
Tangohia te 4x mai i ngā taha e rua.
11x-10=100
Pahekotia te 15x me -4x, ka 11x.
11x=100+10
Me tāpiri te 10 ki ngā taha e rua.
11x=110
Tāpirihia te 100 ki te 10, ka 110.
x=\frac{110}{11}
Whakawehea ngā taha e rua ki te 11.
x=10
Whakawehea te 110 ki te 11, kia riro ko 10.
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