-4+x=21

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Solution for -4+x=21 equation: 


Simplifying
-4 + x = 21

Solving
-4 + x = 21

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + x = 21 + 4

Combine like terms: -4 + 4 = 0
0 + x = 21 + 4
x = 21 + 4

Combine like terms: 21 + 4 = 25
x = 25

Simplifying
x = 25

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