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50(80-x)(4.184)=20(x-20)(4.184)
We move all terms to the left:
50(80-x)(4.184)-(20(x-20)(4.184))=0
We add all the numbers together, and all the variables
50(-1x+80)(4.184)-(20(x-20)(4.184))=0
We multiply parentheses ..
50(-4.184x+334.72)-(20(x-20)(4.184))=0
We calculate terms in parentheses: -(20(x-20)(4.184)), so:We multiply parentheses
20(x-20)(4.184)
We multiply parentheses ..
20(+4.184x-83.68)
We add all the numbers together, and all the variables
20(4.184x-83.68)
We multiply parentheses
80x-1673.6
Back to the equation:
-(80x-1673.6)
-200x-(80x-1673.6)+16736=0
We get rid of parentheses
-200x-80x+1673.6+16736=0
We add all the numbers together, and all the variables
-280x+18409.6=0
We move all terms containing x to the left, all other terms to the right
-280x=-18409.6
x=-18409.6/-280
x=65+131.00000000012/175.00000000016
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