7-21=x+20

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Solution for 7-21=x+20 equation:


Simplifying
7 + -21 = x + 20

Combine like terms: 7 + -21 = -14
-14 = x + 20

Reorder the terms:
-14 = 20 + x

Solving
-14 = 20 + 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 = 20 + x + -1x

Combine like terms: x + -1x = 0
-14 + -1x = 20 + 0
-14 + -1x = 20

Add '14' to each side of the equation.
-14 + 14 + -1x = 20 + 14

Combine like terms: -14 + 14 = 0
0 + -1x = 20 + 14
-1x = 20 + 14

Combine like terms: 20 + 14 = 34
-1x = 34

Divide each side by '-1'.
x = -34

Simplifying
x = -34

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