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2x+5.4=1.2
We move all terms to the left:
2x+5.4-(1.2)=0
We add all the numbers together, and all the variables
2x+4.2=0
We move all terms containing x to the left, all other terms to the right
2x=-4.2
x=-4.2/2
x=-2+0.2/2
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