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

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


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

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

Reorder the terms:
39 + 13x = 7(9 + x)
39 + 13x = (9 * 7 + x * 7)
39 + 13x = (63 + 7x)

Solving
39 + 13x = 63 + 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 + 13x + -7x = 63 + 7x + -7x

Combine like terms: 13x + -7x = 6x
39 + 6x = 63 + 7x + -7x

Combine like terms: 7x + -7x = 0
39 + 6x = 63 + 0
39 + 6x = 63

Add '-39' to each side of the equation.
39 + -39 + 6x = 63 + -39

Combine like terms: 39 + -39 = 0
0 + 6x = 63 + -39
6x = 63 + -39

Combine like terms: 63 + -39 = 24
6x = 24

Divide each side by '6'.
x = 4

Simplifying
x = 4

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