Whakaoti mō x
x=\frac{y+84}{21}
Whakaoti mō y
y=21\left(x-4\right)
Graph
Tohaina
Kua tāruatia ki te papatopenga
42x=168+2y
Me tāpiri te 2y ki ngā taha e rua.
42x=2y+168
He hanga arowhānui tō te whārite.
\frac{42x}{42}=\frac{2y+168}{42}
Whakawehea ngā taha e rua ki te 42.
x=\frac{2y+168}{42}
Mā te whakawehe ki te 42 ka wetekia te whakareanga ki te 42.
x=\frac{y}{21}+4
Whakawehe 168+2y ki te 42.
-2y=168-42x
Tangohia te 42x mai i ngā taha e rua.
\frac{-2y}{-2}=\frac{168-42x}{-2}
Whakawehea ngā taha e rua ki te -2.
y=\frac{168-42x}{-2}
Mā te whakawehe ki te -2 ka wetekia te whakareanga ki te -2.
y=21x-84
Whakawehe 168-42x ki te -2.
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