8x+7+3x+6=90

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Solution for 8x+7+3x+6=90 equation:


Simplifying
8x + 7 + 3x + 6 = 90

Reorder the terms:
7 + 6 + 8x + 3x = 90

Combine like terms: 7 + 6 = 13
13 + 8x + 3x = 90

Combine like terms: 8x + 3x = 11x
13 + 11x = 90

Solving
13 + 11x = 90

Solving for variable 'x'.

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

Add '-13' to each side of the equation.
13 + -13 + 11x = 90 + -13

Combine like terms: 13 + -13 = 0
0 + 11x = 90 + -13
11x = 90 + -13

Combine like terms: 90 + -13 = 77
11x = 77

Divide each side by '11'.
x = 7

Simplifying
x = 7

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