-x+63=21

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Solution for -x+63=21 equation: 


Simplifying
-1x + 63 = 21

Reorder the terms:
63 + -1x = 21

Solving
63 + -1x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-63' to each side of the equation.
63 + -63 + -1x = 21 + -63

Combine like terms: 63 + -63 = 0
0 + -1x = 21 + -63
-1x = 21 + -63

Combine like terms: 21 + -63 = -42
-1x = -42

Divide each side by '-1'.
x = 42

Simplifying
x = 42

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