(9+3)+4=9+(x+4)

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Solution for (9+3)+4=9+(x+4) equation:


Simplifying
(9 + 3) + 4 = 9 + (x + 4)

Combine like terms: 9 + 3 = 12
(12) + 4 = 9 + (x + 4)
12 + 4 = 9 + (x + 4)

Combine like terms: 12 + 4 = 16
16 = 9 + (x + 4)

Reorder the terms:
16 = 9 + (4 + x)

Remove parenthesis around (4 + x)
16 = 9 + 4 + x

Combine like terms: 9 + 4 = 13
16 = 13 + x

Solving
16 = 13 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
16 + -1x = 13 + x + -1x

Combine like terms: x + -1x = 0
16 + -1x = 13 + 0
16 + -1x = 13

Add '-16' to each side of the equation.
16 + -16 + -1x = 13 + -16

Combine like terms: 16 + -16 = 0
0 + -1x = 13 + -16
-1x = 13 + -16

Combine like terms: 13 + -16 = -3
-1x = -3

Divide each side by '-1'.
x = 3

Simplifying
x = 3

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