15-3x=x-7

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Solution for 15-3x=x-7 equation:


Simplifying
15 + -3x = x + -7

Reorder the terms:
15 + -3x = -7 + x

Solving
15 + -3x = -7 + 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.
15 + -3x + -1x = -7 + x + -1x

Combine like terms: -3x + -1x = -4x
15 + -4x = -7 + x + -1x

Combine like terms: x + -1x = 0
15 + -4x = -7 + 0
15 + -4x = -7

Add '-15' to each side of the equation.
15 + -15 + -4x = -7 + -15

Combine like terms: 15 + -15 = 0
0 + -4x = -7 + -15
-4x = -7 + -15

Combine like terms: -7 + -15 = -22
-4x = -22

Divide each side by '-4'.
x = 5.5

Simplifying
x = 5.5

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