55-2x=7x+21

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Solution for 55-2x=7x+21 equation:


Simplifying
55 + -2x = 7x + 21

Reorder the terms:
55 + -2x = 21 + 7x

Solving
55 + -2x = 21 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
55 + -2x + -7x = 21 + 7x + -7x

Combine like terms: -2x + -7x = -9x
55 + -9x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
55 + -9x = 21 + 0
55 + -9x = 21

Add '-55' to each side of the equation.
55 + -55 + -9x = 21 + -55

Combine like terms: 55 + -55 = 0
0 + -9x = 21 + -55
-9x = 21 + -55

Combine like terms: 21 + -55 = -34
-9x = -34

Divide each side by '-9'.
x = 3.777777778

Simplifying
x = 3.777777778

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