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0.8(x-4)=10(4-x)
We move all terms to the left:
0.8(x-4)-(10(4-x))=0
We add all the numbers together, and all the variables
0.8(x-4)-(10(-1x+4))=0
We multiply parentheses
0.8x-(10(-1x+4))-3.2=0
We calculate terms in parentheses: -(10(-1x+4)), so:We get rid of parentheses
10(-1x+4)
We multiply parentheses
-10x+40
Back to the equation:
-(-10x+40)
0.8x+10x-40-3.2=0
We add all the numbers together, and all the variables
10.8x-43.2=0
We move all terms containing x to the left, all other terms to the right
10.8x=43.2
x=43.2/10.8
x=4
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