90-4x=7x+9x

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Solution for 90-4x=7x+9x equation:


90-4x=7x+9x

We simplify the equation to the form, which is simple to understand 
90-4x=7x+9x

We move all terms containing x to the left and all other terms to the right. 
-4x-7x-9x=-90

We simplify left and right side of the equation. 
-20x=-90

We divide both sides of the equation by -20 to get x. 
x=4.5

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