Solve for a
a=-x
Solve for x
x=-a
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2x+2a+4=4
Use the distributive property to multiply a+2 by 2.
2a+4=4-2x
Subtract 2x from both sides.
2a=4-2x-4
Subtract 4 from both sides.
2a=-2x
Subtract 4 from 4 to get 0.
\frac{2a}{2}=-\frac{2x}{2}
Divide both sides by 2.
a=-\frac{2x}{2}
Dividing by 2 undoes the multiplication by 2.
a=-x
Divide -2x by 2.
2x+2a+4=4
Use the distributive property to multiply a+2 by 2.
2x+4=4-2a
Subtract 2a from both sides.
2x=4-2a-4
Subtract 4 from both sides.
2x=-2a
Subtract 4 from 4 to get 0.
\frac{2x}{2}=-\frac{2a}{2}
Divide both sides by 2.
x=-\frac{2a}{2}
Dividing by 2 undoes the multiplication by 2.
x=-a
Divide -2a by 2.
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Limits
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