21x-13x=56

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Solution for 21x-13x=56 equation: 


Simplifying
21x + -13x = 56

Combine like terms: 21x + -13x = 8x
8x = 56

Solving
8x = 56

Solving for variable 'x'.

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

Divide each side by '8'.
x = 7

Simplifying
x = 7

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