Solve for a
a=-\left(8+c+b-x\right)
Solve for b
b=-\left(8+c+a-x\right)
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a+2+b+c+1+5=x
Add 1 and 1 to get 2.
a+3+b+c+5=x
Add 2 and 1 to get 3.
a+8+b+c=x
Add 3 and 5 to get 8.
a+b+c=x-8
Subtract 8 from both sides.
a+c=x-8-b
Subtract b from both sides.
a=x-8-b-c
Subtract c from both sides.
a+2+b+c+1+5=x
Add 1 and 1 to get 2.
a+3+b+c+5=x
Add 2 and 1 to get 3.
a+8+b+c=x
Add 3 and 5 to get 8.
8+b+c=x-a
Subtract a from both sides.
b+c=x-a-8
Subtract 8 from both sides.
b=x-a-8-c
Subtract c from both sides.
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