90x+70x=640

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Solution for 90x+70x=640 equation: 


Simplifying
90x + 70x = 640

Combine like terms: 90x + 70x = 160x
160x = 640

Solving
160x = 640

Solving for variable 'x'.

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

Divide each side by '160'.
x = 4

Simplifying
x = 4

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