Whakaoti mō y
y=6
Graph
Tohaina
Kua tāruatia ki te papatopenga
20y-\left(120-12y\right)=72
Whakamahia te āhuatanga tohatoha hei whakarea te 10-y ki te 12.
20y-120-\left(-12y\right)=72
Hei kimi i te tauaro o 120-12y, kimihia te tauaro o ia taurangi.
20y-120+12y=72
Ko te tauaro o -12y ko 12y.
32y-120=72
Pahekotia te 20y me 12y, ka 32y.
32y=72+120
Me tāpiri te 120 ki ngā taha e rua.
32y=192
Tāpirihia te 72 ki te 120, ka 192.
y=\frac{192}{32}
Whakawehea ngā taha e rua ki te 32.
y=6
Whakawehea te 192 ki te 32, kia riro ko 6.
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