45-x=4x-15

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Solution for 45-x=4x-15 equation:


Simplifying
45 + -1x = 4x + -15

Reorder the terms:
45 + -1x = -15 + 4x

Solving
45 + -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.
45 + -1x + -4x = -15 + 4x + -4x

Combine like terms: -1x + -4x = -5x
45 + -5x = -15 + 4x + -4x

Combine like terms: 4x + -4x = 0
45 + -5x = -15 + 0
45 + -5x = -15

Add '-45' to each side of the equation.
45 + -45 + -5x = -15 + -45

Combine like terms: 45 + -45 = 0
0 + -5x = -15 + -45
-5x = -15 + -45

Combine like terms: -15 + -45 = -60
-5x = -60

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

Simplifying
x = 12

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