Solve for x
x=\frac{y+10}{3}
Solve for y
y=3x-10
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3x-y=9+1
Add 1 to both sides.
3x-y=10
Add 9 and 1 to get 10.
3x=10+y
Add y to both sides.
3x=y+10
The equation is in standard form.
\frac{3x}{3}=\frac{y+10}{3}
Divide both sides by 3.
x=\frac{y+10}{3}
Dividing by 3 undoes the multiplication by 3.
-1-y=9-3x
Subtract 3x from both sides.
-y=9-3x+1
Add 1 to both sides.
-y=10-3x
Add 9 and 1 to get 10.
\frac{-y}{-1}=\frac{10-3x}{-1}
Divide both sides by -1.
y=\frac{10-3x}{-1}
Dividing by -1 undoes the multiplication by -1.
y=3x-10
Divide 10-3x by -1.
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