21x-56=x+4

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Solution for 21x-56=x+4 equation:


Simplifying
21x + -56 = x + 4

Reorder the terms:
-56 + 21x = x + 4

Reorder the terms:
-56 + 21x = 4 + x

Solving
-56 + 21x = 4 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-56 + 21x + -1x = 4 + x + -1x

Combine like terms: 21x + -1x = 20x
-56 + 20x = 4 + x + -1x

Combine like terms: x + -1x = 0
-56 + 20x = 4 + 0
-56 + 20x = 4

Add '56' to each side of the equation.
-56 + 56 + 20x = 4 + 56

Combine like terms: -56 + 56 = 0
0 + 20x = 4 + 56
20x = 4 + 56

Combine like terms: 4 + 56 = 60
20x = 60

Divide each side by '20'.
x = 3

Simplifying
x = 3

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