5x+15=x-20

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Solution for 5x+15=x-20 equation:


Simplifying
5x + 15 = x + -20

Reorder the terms:
15 + 5x = x + -20

Reorder the terms:
15 + 5x = -20 + x

Solving
15 + 5x = -20 + 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 + 5x + -1x = -20 + x + -1x

Combine like terms: 5x + -1x = 4x
15 + 4x = -20 + x + -1x

Combine like terms: x + -1x = 0
15 + 4x = -20 + 0
15 + 4x = -20

Add '-15' to each side of the equation.
15 + -15 + 4x = -20 + -15

Combine like terms: 15 + -15 = 0
0 + 4x = -20 + -15
4x = -20 + -15

Combine like terms: -20 + -15 = -35
4x = -35

Divide each side by '4'.
x = -8.75

Simplifying
x = -8.75

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