Solve for x
x=3
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-21=-11x+12
Combine x and -12x to get -11x.
-11x+12=-21
Swap sides so that all variable terms are on the left hand side.
-11x=-21-12
Subtract 12 from both sides.
-11x=-33
Subtract 12 from -21 to get -33.
x=\frac{-33}{-11}
Divide both sides by -11.
x=3
Divide -33 by -11 to get 3.
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