6x+2x=21-3

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Solution for 6x+2x=21-3 equation: 


Simplifying
6x + 2x = 21 + -3

Combine like terms: 6x + 2x = 8x
8x = 21 + -3

Combine like terms: 21 + -3 = 18
8x = 18

Solving
8x = 18

Solving for variable 'x'.

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

Divide each side by '8'.
x = 2.25

Simplifying
x = 2.25

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