2x+5(x+9)=129

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Solution for 2x+5(x+9)=129 equation:


Simplifying
2x + 5(x + 9) = 129

Reorder the terms:
2x + 5(9 + x) = 129
2x + (9 * 5 + x * 5) = 129
2x + (45 + 5x) = 129

Reorder the terms:
45 + 2x + 5x = 129

Combine like terms: 2x + 5x = 7x
45 + 7x = 129

Solving
45 + 7x = 129

Solving for variable 'x'.

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

Add '-45' to each side of the equation.
45 + -45 + 7x = 129 + -45

Combine like terms: 45 + -45 = 0
0 + 7x = 129 + -45
7x = 129 + -45

Combine like terms: 129 + -45 = 84
7x = 84

Divide each side by '7'.
x = 12

Simplifying
x = 12

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