Solve for x
x=\frac{-3y-21}{4}
Solve for y
y=-\frac{4x}{3}-7
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-3y+3x=7x+21
Use the distributive property to multiply 7 by x+3.
-3y+3x-7x=21
Subtract 7x from both sides.
-3y-4x=21
Combine 3x and -7x to get -4x.
-4x=21+3y
Add 3y to both sides.
-4x=3y+21
The equation is in standard form.
\frac{-4x}{-4}=\frac{3y+21}{-4}
Divide both sides by -4.
x=\frac{3y+21}{-4}
Dividing by -4 undoes the multiplication by -4.
x=\frac{-3y-21}{4}
Divide 21+3y by -4.
-3y+3x=7x+21
Use the distributive property to multiply 7 by x+3.
-3y=7x+21-3x
Subtract 3x from both sides.
-3y=4x+21
Combine 7x and -3x to get 4x.
\frac{-3y}{-3}=\frac{4x+21}{-3}
Divide both sides by -3.
y=\frac{4x+21}{-3}
Dividing by -3 undoes the multiplication by -3.
y=-\frac{4x}{3}-7
Divide 4x+21 by -3.
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