X-(-7)=21

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Solution for X-(-7)=21 equation: 


Simplifying
X + -1(-7) = 21

Multiply -1 * -7
X + 7 = 21

Reorder the terms:
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 = 14
X = 14

Simplifying
X = 14

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