126-7x=20x+21

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Solution for 126-7x=20x+21 equation:


Simplifying
126 + -7x = 20x + 21

Reorder the terms:
126 + -7x = 21 + 20x

Solving
126 + -7x = 21 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
126 + -7x + -20x = 21 + 20x + -20x

Combine like terms: -7x + -20x = -27x
126 + -27x = 21 + 20x + -20x

Combine like terms: 20x + -20x = 0
126 + -27x = 21 + 0
126 + -27x = 21

Add '-126' to each side of the equation.
126 + -126 + -27x = 21 + -126

Combine like terms: 126 + -126 = 0
0 + -27x = 21 + -126
-27x = 21 + -126

Combine like terms: 21 + -126 = -105
-27x = -105

Divide each side by '-27'.
x = 3.888888889

Simplifying
x = 3.888888889

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