40-x=4x-50

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Solution for 40-x=4x-50 equation:


Simplifying
40 + -1x = 4x + -50

Reorder the terms:
40 + -1x = -50 + 4x

Solving
40 + -1x = -50 + 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.
40 + -1x + -4x = -50 + 4x + -4x

Combine like terms: -1x + -4x = -5x
40 + -5x = -50 + 4x + -4x

Combine like terms: 4x + -4x = 0
40 + -5x = -50 + 0
40 + -5x = -50

Add '-40' to each side of the equation.
40 + -40 + -5x = -50 + -40

Combine like terms: 40 + -40 = 0
0 + -5x = -50 + -40
-5x = -50 + -40

Combine like terms: -50 + -40 = -90
-5x = -90

Divide each side by '-5'.
x = 18

Simplifying
x = 18

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