Solve for x
x=7-y
Solve for y
y=7-x
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12x=84-12y
Subtract 12y from both sides.
\frac{12x}{12}=\frac{84-12y}{12}
Divide both sides by 12.
x=\frac{84-12y}{12}
Dividing by 12 undoes the multiplication by 12.
x=7-y
Divide 84-12y by 12.
12y=84-12x
Subtract 12x from both sides.
\frac{12y}{12}=\frac{84-12x}{12}
Divide both sides by 12.
y=\frac{84-12x}{12}
Dividing by 12 undoes the multiplication by 12.
y=7-x
Divide 84-12x by 12.
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