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3.5x=10-30
We move all terms to the left:
3.5x-(10-30)=0
We add all the numbers together, and all the variables
3.5x-(-20)=0
We add all the numbers together, and all the variables
3.5x+20=0
We move all terms containing x to the left, all other terms to the right
3.5x=-20
x=-20/3.5
x=-5+2.5/3.5
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