129=3(8+5x)

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Solution for 129=3(8+5x) equation:


Simplifying
129 = 3(8 + 5x)
129 = (8 * 3 + 5x * 3)
129 = (24 + 15x)

Solving
129 = 24 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
129 + -15x = 24 + 15x + -15x

Combine like terms: 15x + -15x = 0
129 + -15x = 24 + 0
129 + -15x = 24

Add '-129' to each side of the equation.
129 + -129 + -15x = 24 + -129

Combine like terms: 129 + -129 = 0
0 + -15x = 24 + -129
-15x = 24 + -129

Combine like terms: 24 + -129 = -105
-15x = -105

Divide each side by '-15'.
x = 7

Simplifying
x = 7

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