Whakaoti mō b
b=\frac{5\left(w-16\right)}{4}
Whakaoti mō w
w=\frac{4\left(b+20\right)}{5}
Tohaina
Kua tāruatia ki te papatopenga
5w-4b=80
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.
-4b=80-5w
Tangohia te 5w mai i ngā taha e rua.
\frac{-4b}{-4}=\frac{80-5w}{-4}
Whakawehea ngā taha e rua ki te -4.
b=\frac{80-5w}{-4}
Mā te whakawehe ki te -4 ka wetekia te whakareanga ki te -4.
b=\frac{5w}{4}-20
Whakawehe 80-5w ki te -4.
5w-4b=80
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.
5w=80+4b
Me tāpiri te 4b ki ngā taha e rua.
5w=4b+80
He hanga arowhānui tō te whārite.
\frac{5w}{5}=\frac{4b+80}{5}
Whakawehea ngā taha e rua ki te 5.
w=\frac{4b+80}{5}
Mā te whakawehe ki te 5 ka wetekia te whakareanga ki te 5.
w=\frac{4b}{5}+16
Whakawehe 80+4b ki te 5.
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