30x+20x=450

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Solution for 30x+20x=450 equation: 


Simplifying
30x + 20x = 450

Combine like terms: 30x + 20x = 50x
50x = 450

Solving
50x = 450

Solving for variable 'x'.

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

Divide each side by '50'.
x = 9

Simplifying
x = 9

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