8X+7X+15=90

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Solution for 8X+7X+15=90 equation:


Simplifying
8X + 7X + 15 = 90

Reorder the terms:
15 + 8X + 7X = 90

Combine like terms: 8X + 7X = 15X
15 + 15X = 90

Solving
15 + 15X = 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 + -15 + 15X = 90 + -15

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

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

Divide each side by '15'.
X = 5

Simplifying
X = 5

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