125-3x=15x+21

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Solution for 125-3x=15x+21 equation:


Simplifying
125 + -3x = 15x + 21

Reorder the terms:
125 + -3x = 21 + 15x

Solving
125 + -3x = 21 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
125 + -3x + -15x = 21 + 15x + -15x

Combine like terms: -3x + -15x = -18x
125 + -18x = 21 + 15x + -15x

Combine like terms: 15x + -15x = 0
125 + -18x = 21 + 0
125 + -18x = 21

Add '-125' to each side of the equation.
125 + -125 + -18x = 21 + -125

Combine like terms: 125 + -125 = 0
0 + -18x = 21 + -125
-18x = 21 + -125

Combine like terms: 21 + -125 = -104
-18x = -104

Divide each side by '-18'.
x = 5.777777778

Simplifying
x = 5.777777778

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