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180=90+x+x/2
We move all terms to the left:
180-(90+x+x/2)=0
We add all the numbers together, and all the variables
-(x+x/2+90)+180=0
We get rid of parentheses
-x-x/2-90+180=0
We multiply all the terms by the denominator
-x*2-x-90*2+180*2=0
We add all the numbers together, and all the variables
-1x-x*2+180=0
Wy multiply elements
-1x-2x+180=0
We add all the numbers together, and all the variables
-3x+180=0
We move all terms containing x to the left, all other terms to the right
-3x=-180
x=-180/-3
x=+60
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