3x+15=81-8x

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Solution for 3x+15=81-8x equation:


Simplifying
3x + 15 = 81 + -8x

Reorder the terms:
15 + 3x = 81 + -8x

Solving
15 + 3x = 81 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
15 + 3x + 8x = 81 + -8x + 8x

Combine like terms: 3x + 8x = 11x
15 + 11x = 81 + -8x + 8x

Combine like terms: -8x + 8x = 0
15 + 11x = 81 + 0
15 + 11x = 81

Add '-15' to each side of the equation.
15 + -15 + 11x = 81 + -15

Combine like terms: 15 + -15 = 0
0 + 11x = 81 + -15
11x = 81 + -15

Combine like terms: 81 + -15 = 66
11x = 66

Divide each side by '11'.
x = 6

Simplifying
x = 6

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