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-2.1(x+3.4)=-3.57
We move all terms to the left:
-2.1(x+3.4)-(-3.57)=0
We add all the numbers together, and all the variables
-2.1(x+3.4)+3.57=0
We multiply parentheses
-2.1x-7.14+3.57=0
We add all the numbers together, and all the variables
-2.1x-3.57=0
We move all terms containing x to the left, all other terms to the right
-2.1x=3.57
x=3.57/-2.1
x=-1+1/1.42857142857
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