21x-6x=75

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Solution for 21x-6x=75 equation: 


Simplifying
21x + -6x = 75

Combine like terms: 21x + -6x = 15x
15x = 75

Solving
15x = 75

Solving for variable 'x'.

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

Divide each side by '15'.
x = 5

Simplifying
x = 5

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