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-0.5x+2.1=-0.4x+4.8
We move all terms to the left:
-0.5x+2.1-(-0.4x+4.8)=0
We get rid of parentheses
-0.5x+0.4x-4.8+2.1=0
We add all the numbers together, and all the variables
-0.1x-2.7=0
We move all terms containing x to the left, all other terms to the right
-0.1x=2.7
x=2.7/-0.1
x=-27
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