7x+2x=40

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Solution for 7x+2x=40 equation: 


Simplifying
7x + 2x = 40

Combine like terms: 7x + 2x = 9x
9x = 40

Solving
9x = 40

Solving for variable 'x'.

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

Divide each side by '9'.
x = 4.444444444

Simplifying
x = 4.444444444

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