15=8x+4-7x

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Solution for 15=8x+4-7x equation:


Simplifying
15 = 8x + 4 + -7x

Reorder the terms:
15 = 4 + 8x + -7x

Combine like terms: 8x + -7x = 1x
15 = 4 + 1x

Solving
15 = 4 + 1x

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.
15 + -1x = 4 + 1x + -1x

Combine like terms: 1x + -1x = 0
15 + -1x = 4 + 0
15 + -1x = 4

Add '-15' to each side of the equation.
15 + -15 + -1x = 4 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 4 + -15
-1x = 4 + -15

Combine like terms: 4 + -15 = -11
-1x = -11

Divide each side by '-1'.
x = 11

Simplifying
x = 11

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