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3.4-x-2.x-1=x+20
We move all terms to the left:
3.4-x-2.x-1-(x+20)=0
We add all the numbers together, and all the variables
-3x-(x+20)+2.4=0
We get rid of parentheses
-3x-x-20+2.4=0
We add all the numbers together, and all the variables
-4x-17.6=0
We move all terms containing x to the left, all other terms to the right
-4x=17.6
x=17.6/-4
x=-4+1/2.5
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