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20+15x+20(x-1)+15(x-1)=245
We simplify the equation to the form, which is simple to understand
20+15x+20(x-1)+15(x-1)=245
Reorder the terms in parentheses
20+15x+(+20x-20)+15*(x-1)=245
Remove unnecessary parentheses
+20+15x+20x-20+15+*(+x-1+)=+245
Reorder the terms in parentheses
20+15x+20x-20+(+15x-15)=245
Remove unnecessary parentheses
+20+15x+20x-20+15x-15=+245
We move all terms containing x to the left and all other terms to the right.
+15x+20x+15x=+245-20+20+15
We simplify left and right side of the equation.
+50x=+260
We divide both sides of the equation by 50 to get x.
x=5.2
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