3(x+13)=7x-9

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Solution for 3(x+13)=7x-9 equation:


Simplifying
3(x + 13) = 7x + -9

Reorder the terms:
3(13 + x) = 7x + -9
(13 * 3 + x * 3) = 7x + -9
(39 + 3x) = 7x + -9

Reorder the terms:
39 + 3x = -9 + 7x

Solving
39 + 3x = -9 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
39 + 3x + -7x = -9 + 7x + -7x

Combine like terms: 3x + -7x = -4x
39 + -4x = -9 + 7x + -7x

Combine like terms: 7x + -7x = 0
39 + -4x = -9 + 0
39 + -4x = -9

Add '-39' to each side of the equation.
39 + -39 + -4x = -9 + -39

Combine like terms: 39 + -39 = 0
0 + -4x = -9 + -39
-4x = -9 + -39

Combine like terms: -9 + -39 = -48
-4x = -48

Divide each side by '-4'.
x = 12

Simplifying
x = 12

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