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0.8(220-13)=x
We move all terms to the left:
0.8(220-13)-(x)=0
We add all the numbers together, and all the variables
-x+0.8207=0
We add all the numbers together, and all the variables
-1x+0.8207=0
We move all terms containing x to the left, all other terms to the right
-x=-0.8207
x=-0.8207/-1
x=0.8207/1
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