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5x+3.3=-7.2
We move all terms to the left:
5x+3.3-(-7.2)=0
We add all the numbers together, and all the variables
5x+10.5=0
We move all terms containing x to the left, all other terms to the right
5x=-10.5
x=-10.5/5
x=-2+0.5/5
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