Solve for x
x=3
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9x-\left(20+x\right)=-x+7
Add 8 and 12 to get 20.
9x-20-x=-x+7
To find the opposite of 20+x, find the opposite of each term.
8x-20=-x+7
Combine 9x and -x to get 8x.
8x-20+x=7
Add x to both sides.
9x-20=7
Combine 8x and x to get 9x.
9x=7+20
Add 20 to both sides.
9x=27
Add 7 and 20 to get 27.
x=\frac{27}{9}
Divide both sides by 9.
x=3
Divide 27 by 9 to get 3.
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