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x+90+(90+3x/2)=180
We move all terms to the left:
x+90+(90+3x/2)-(180)=0
We add all the numbers together, and all the variables
x+(3x/2+90)+90-180=0
We add all the numbers together, and all the variables
x+(3x/2+90)-90=0
We get rid of parentheses
x+3x/2+90-90=0
We multiply all the terms by the denominator
x*2+3x+90*2-90*2=0
We add all the numbers together, and all the variables
3x+x*2=0
Wy multiply elements
3x+2x=0
We add all the numbers together, and all the variables
5x=0
x=0/5
x=0
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