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215-(18x-50)=(75+2x)+(15-15x)
We move all terms to the left:
215-(18x-50)-((75+2x)+(15-15x))=0
We add all the numbers together, and all the variables
-(18x-50)-((2x+75)+(-15x+15))+215=0
We get rid of parentheses
-18x-((2x+75)+(-15x+15))+50+215=0
We calculate terms in parentheses: -((2x+75)+(-15x+15)), so:We add all the numbers together, and all the variables
(2x+75)+(-15x+15)
We get rid of parentheses
2x-15x+75+15
We add all the numbers together, and all the variables
-13x+90
Back to the equation:
-(-13x+90)
-18x-(-13x+90)+265=0
We get rid of parentheses
-18x+13x-90+265=0
We add all the numbers together, and all the variables
-5x+175=0
We move all terms containing x to the left, all other terms to the right
-5x=-175
x=-175/-5
x=+35
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