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90x+15-20x-260=450-270+6x
We simplify the equation to the form, which is simple to understand
90x+15-20x-260=450-270+6x
We move all terms containing x to the left and all other terms to the right.
+90x-20x-6x=+450-270-15+260
We simplify left and right side of the equation.
+64x=+425
We divide both sides of the equation by 64 to get x.
x=6.640625
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