-x+36=21

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Solution for -x+36=21 equation: 


Simplifying
-1x + 36 = 21

Reorder the terms:
36 + -1x = 21

Solving
36 + -1x = 21

Solving for variable 'x'.

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

Add '-36' to each side of the equation.
36 + -36 + -1x = 21 + -36

Combine like terms: 36 + -36 = 0
0 + -1x = 21 + -36
-1x = 21 + -36

Combine like terms: 21 + -36 = -15
-1x = -15

Divide each side by '-1'.
x = 15

Simplifying
x = 15

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