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4.3x-07(x+2.1)=8.61
We move all terms to the left:
4.3x-07(x+2.1)-(8.61)=0
We add all the numbers together, and all the variables
4.3x-07(x+2.1)-8.61=0
We multiply parentheses
4.3x-7x-14.7-8.61=0
We add all the numbers together, and all the variables
-2.7x-23.31=0
We move all terms containing x to the left, all other terms to the right
-2.7x=23.31
x=23.31/-2.7
x=-8+1/1.5789473684211
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