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2.5-4x-3-0.5x=12+7x-20+4x-11.5
We move all terms to the left:
2.5-4x-3-0.5x-(12+7x-20+4x-11.5)=0
We add all the numbers together, and all the variables
-4x-0.5x-(11x-19.5)+2.5-3=0
We add all the numbers together, and all the variables
-4.5x-(11x-19.5)-0.5=0
We get rid of parentheses
-4.5x-11x+19.5-0.5=0
We add all the numbers together, and all the variables
-15.5x+19=0
We move all terms containing x to the left, all other terms to the right
-15.5x=-19
x=-19/-15.5
x=1+1/4.42857142857
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