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0.8x*4=30.4
We move all terms to the left:
0.8x*4-(30.4)=0
We add all the numbers together, and all the variables
0.8x*4-30.4=0
We move all terms containing x to the left, all other terms to the right
0.8x*4=30.4
x=30.4/1
x=30.4
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