21-7=27+x

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Solution for 21-7=27+x equation: 


Simplifying
21 + -7 = 27 + x

Combine like terms: 21 + -7 = 14
14 = 27 + x

Solving
14 = 27 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
14 + -1x = 27 + x + -1x

Combine like terms: x + -1x = 0
14 + -1x = 27 + 0
14 + -1x = 27

Add '-14' to each side of the equation.
14 + -14 + -1x = 27 + -14

Combine like terms: 14 + -14 = 0
0 + -1x = 27 + -14
-1x = 27 + -14

Combine like terms: 27 + -14 = 13
-1x = 13

Divide each side by '-1'.
x = -13

Simplifying
x = -13

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