X-18+x-20=90

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Solution for X-18+x-20=90 equation:


Simplifying
X + -18 + x + -20 = 90

Reorder the terms:
-18 + -20 + X + x = 90

Combine like terms: -18 + -20 = -38
-38 + X + x = 90

Solving
-38 + X + x = 90

Solving for variable 'X'.

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

Add '38' to each side of the equation.
-38 + X + 38 + x = 90 + 38

Reorder the terms:
-38 + 38 + X + x = 90 + 38

Combine like terms: -38 + 38 = 0
0 + X + x = 90 + 38
X + x = 90 + 38

Combine like terms: 90 + 38 = 128
X + x = 128

Add '-1x' to each side of the equation.
X + x + -1x = 128 + -1x

Combine like terms: x + -1x = 0
X + 0 = 128 + -1x
X = 128 + -1x

Simplifying
X = 128 + -1x

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