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X+5.4=2.8X
We move all terms to the left:
X+5.4-(2.8X)=0
We add all the numbers together, and all the variables
X-(+2.8X)+5.4=0
We get rid of parentheses
X-2.8X+5.4=0
We add all the numbers together, and all the variables
-1.8X+5.4=0
We move all terms containing X to the left, all other terms to the right
-1.8X=-5.4
X=-5.4/-1.8
X=+3
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