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-1.8x=-5.4
We move all terms to the left:
-1.8x-(-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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