X+69+x+39=90

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Solution for X+69+x+39=90 equation:


Simplifying
X + 69 + x + 39 = 90

Reorder the terms:
69 + 39 + X + x = 90

Combine like terms: 69 + 39 = 108
108 + X + x = 90

Solving
108 + X + x = 90

Solving for variable 'X'.

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

Add '-108' to each side of the equation.
108 + X + -108 + x = 90 + -108

Reorder the terms:
108 + -108 + X + x = 90 + -108

Combine like terms: 108 + -108 = 0
0 + X + x = 90 + -108
X + x = 90 + -108

Combine like terms: 90 + -108 = -18
X + x = -18

Add '-1x' to each side of the equation.
X + x + -1x = -18 + -1x

Combine like terms: x + -1x = 0
X + 0 = -18 + -1x
X = -18 + -1x

Simplifying
X = -18 + -1x

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