(3x)+(8x+13)=90

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Solution for (3x)+(8x+13)=90 equation:


Simplifying
(3x) + (8x + 13) = 90

Reorder the terms:
(3x) + (13 + 8x) = 90

Remove parenthesis around (13 + 8x)
(3x) + 13 + 8x = 90

Reorder the terms:
13 + (3x) + 8x = 90

Combine like terms: (3x) + 8x = 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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