Whakaoti mō x
x=1
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Tohaina
Kua tāruatia ki te papatopenga
3\left(x+6\right)+7\left(x+2\right)=42
Me whakarea ngā taha e rua o te whārite ki te 21, arā, te tauraro pātahi he tino iti rawa te kitea o 7,3.
3x+18+7\left(x+2\right)=42
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te x+6.
3x+18+7x+14=42
Whakamahia te āhuatanga tohatoha hei whakarea te 7 ki te x+2.
10x+18+14=42
Pahekotia te 3x me 7x, ka 10x.
10x+32=42
Tāpirihia te 18 ki te 14, ka 32.
10x=42-32
Tangohia te 32 mai i ngā taha e rua.
10x=10
Tangohia te 32 i te 42, ka 10.
x=\frac{10}{10}
Whakawehea ngā taha e rua ki te 10.
x=1
Whakawehea te 10 ki te 10, kia riro ko 1.
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