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0.8x-3=-21.4
We move all terms to the left:
0.8x-3-(-21.4)=0
We add all the numbers together, and all the variables
0.8x+18.4=0
We move all terms containing x to the left, all other terms to the right
0.8x=-18.4
x=-18.4/0.8
x=-22+0.8/0.8
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