25-x-4x-5=-40

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Solution for 25-x-4x-5=-40 equation:


Simplifying
25 + -1x + -4x + -5 = -40

Reorder the terms:
25 + -5 + -1x + -4x = -40

Combine like terms: 25 + -5 = 20
20 + -1x + -4x = -40

Combine like terms: -1x + -4x = -5x
20 + -5x = -40

Solving
20 + -5x = -40

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + -5x = -40 + -20

Combine like terms: 20 + -20 = 0
0 + -5x = -40 + -20
-5x = -40 + -20

Combine like terms: -40 + -20 = -60
-5x = -60

Divide each side by '-5'.
x = 12

Simplifying
x = 12

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