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x*15+(x+5)*20=415
We simplify the equation to the form, which is simple to understand
x*15+(x+5)*20=415
Simplifying:
+15x+(x+5)*20=415
Reorder the terms in parentheses
+15x+(+20x+100)=415
Remove unnecessary parentheses
+15x+20x+100=+415
We move all terms containing x to the left and all other terms to the right.
+15x+20x=+415-100
We simplify left and right side of the equation.
+35x=+315
We divide both sides of the equation by 35 to get x.
x=9
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