-7+x=21

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Solution for -7+x=21 equation: 


Simplifying
-7 + x = 21

Solving
-7 + x = 21

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + x = 21 + 7
x = 21 + 7

Combine like terms: 21 + 7 = 28
x = 28

Simplifying
x = 28

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