-x-15=15-4x

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Solution for -x-15=15-4x equation:


Simplifying
-1x + -15 = 15 + -4x

Reorder the terms:
-15 + -1x = 15 + -4x

Solving
-15 + -1x = 15 + -4x

Solving for variable 'x'.

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

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

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

Combine like terms: -4x + 4x = 0
-15 + 3x = 15 + 0
-15 + 3x = 15

Add '15' to each side of the equation.
-15 + 15 + 3x = 15 + 15

Combine like terms: -15 + 15 = 0
0 + 3x = 15 + 15
3x = 15 + 15

Combine like terms: 15 + 15 = 30
3x = 30

Divide each side by '3'.
x = 10

Simplifying
x = 10

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