3x+8+x+7=90

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Solution for 3x+8+x+7=90 equation:


Simplifying
3x + 8 + x + 7 = 90

Reorder the terms:
8 + 7 + 3x + x = 90

Combine like terms: 8 + 7 = 15
15 + 3x + x = 90

Combine like terms: 3x + x = 4x
15 + 4x = 90

Solving
15 + 4x = 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 + 4x = 90 + -15

Combine like terms: 15 + -15 = 0
0 + 4x = 90 + -15
4x = 90 + -15

Combine like terms: 90 + -15 = 75
4x = 75

Divide each side by '4'.
x = 18.75

Simplifying
x = 18.75

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