X+x+15=90

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Solution for X+x+15=90 equation:


Simplifying
X + x + 15 = 90

Reorder the terms:
15 + X + x = 90

Solving
15 + X + x = 90

Solving for variable 'X'.

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

Add '-15' to each side of the equation.
15 + X + -15 + x = 90 + -15

Reorder the terms:
15 + -15 + X + x = 90 + -15

Combine like terms: 15 + -15 = 0
0 + X + x = 90 + -15
X + x = 90 + -15

Combine like terms: 90 + -15 = 75
X + x = 75

Add '-1x' to each side of the equation.
X + x + -1x = 75 + -1x

Combine like terms: x + -1x = 0
X + 0 = 75 + -1x
X = 75 + -1x

Simplifying
X = 75 + -1x

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