7x+2x=21-3

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Solution for 7x+2x=21-3 equation: 


Simplifying
7x + 2x = 21 + -3

Combine like terms: 7x + 2x = 9x
9x = 21 + -3

Combine like terms: 21 + -3 = 18
9x = 18

Solving
9x = 18

Solving for variable 'x'.

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

Divide each side by '9'.
x = 2

Simplifying
x = 2

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