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3x+x+x/2=180
We move all terms to the left:
3x+x+x/2-(180)=0
We add all the numbers together, and all the variables
4x+x/2-180=0
We multiply all the terms by the denominator
4x*2+x-180*2=0
We add all the numbers together, and all the variables
x+4x*2-360=0
Wy multiply elements
x+8x-360=0
We add all the numbers together, and all the variables
9x-360=0
We move all terms containing x to the left, all other terms to the right
9x=360
x=360/9
x=40
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