X-(-20)=-90

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Solution for X-(-20)=-90 equation: 


Simplifying
X + -1(-20) = -90

Multiply -1 * -20
X + 20 = -90

Reorder the terms:
20 + X = -90

Solving
20 + X = -90

Solving for variable 'X'.

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

Add '-20' to each side of the equation.
20 + -20 + X = -90 + -20

Combine like terms: 20 + -20 = 0
0 + X = -90 + -20
X = -90 + -20

Combine like terms: -90 + -20 = -110
X = -110

Simplifying
X = -110

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