x+4+x+12=15

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Solution for x+4+x+12=15 equation: 


Simplifying
x + 4 + x + 12 = 15

Reorder the terms:
4 + 12 + x + x = 15

Combine like terms: 4 + 12 = 16
16 + x + x = 15

Combine like terms: x + x = 2x
16 + 2x = 15

Solving
16 + 2x = 15

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + 2x = 15 + -16

Combine like terms: 16 + -16 = 0
0 + 2x = 15 + -16
2x = 15 + -16

Combine like terms: 15 + -16 = -1
2x = -1

Divide each side by '2'.
x = -0.5

Simplifying
x = -0.5

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