3x+4(x+13)=129

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Solution for 3x+4(x+13)=129 equation:


Simplifying
3x + 4(x + 13) = 129

Reorder the terms:
3x + 4(13 + x) = 129
3x + (13 * 4 + x * 4) = 129
3x + (52 + 4x) = 129

Reorder the terms:
52 + 3x + 4x = 129

Combine like terms: 3x + 4x = 7x
52 + 7x = 129

Solving
52 + 7x = 129

Solving for variable 'x'.

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

Add '-52' to each side of the equation.
52 + -52 + 7x = 129 + -52

Combine like terms: 52 + -52 = 0
0 + 7x = 129 + -52
7x = 129 + -52

Combine like terms: 129 + -52 = 77
7x = 77

Divide each side by '7'.
x = 11

Simplifying
x = 11

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