Solve for a
a=b+c+10
Solve for b
b=a-c-10
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a-c=10+b
Add b to both sides.
a=10+b+c
Add c to both sides.
-b-c=10-a
Subtract a from both sides.
-b=10-a+c
Add c to both sides.
-b=10+c-a
The equation is in standard form.
\frac{-b}{-1}=\frac{10+c-a}{-1}
Divide both sides by -1.
b=\frac{10+c-a}{-1}
Dividing by -1 undoes the multiplication by -1.
b=a-c-10
Divide 10-a+c by -1.
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