Solve for a
a=-\left(b+c\right)
Solve for b
b=-\left(a+c\right)
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2a+2c=-2b
Subtract 2b from both sides. Anything subtracted from zero gives its negation.
2a=-2b-2c
Subtract 2c from both sides.
\frac{2a}{2}=\frac{-2b-2c}{2}
Divide both sides by 2.
a=\frac{-2b-2c}{2}
Dividing by 2 undoes the multiplication by 2.
a=-b-c
Divide -2b-2c by 2.
2b+2c=-2a
Subtract 2a from both sides. Anything subtracted from zero gives its negation.
2b=-2a-2c
Subtract 2c from both sides.
\frac{2b}{2}=\frac{-2a-2c}{2}
Divide both sides by 2.
b=\frac{-2a-2c}{2}
Dividing by 2 undoes the multiplication by 2.
b=-a-c
Divide -2a-2c by 2.
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