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-2.9-5x-4.5-x=-5x-3.9
We move all terms to the left:
-2.9-5x-4.5-x-(-5x-3.9)=0
We add all the numbers together, and all the variables
-6x-(-5x-3.9)-7.4=0
We get rid of parentheses
-6x+5x+3.9-7.4=0
We add all the numbers together, and all the variables
-1x-3.5=0
We move all terms containing x to the left, all other terms to the right
-x=3.5
x=3.5/-1
x=-3+0.5/1
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