21x-8=55

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Solution for 21x-8=55 equation: 


Simplifying
21x + -8 = 55

Reorder the terms:
-8 + 21x = 55

Solving
-8 + 21x = 55

Solving for variable 'x'.

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

Add '8' to each side of the equation.
-8 + 8 + 21x = 55 + 8

Combine like terms: -8 + 8 = 0
0 + 21x = 55 + 8
21x = 55 + 8

Combine like terms: 55 + 8 = 63
21x = 63

Divide each side by '21'.
x = 3

Simplifying
x = 3

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