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1/2-0.2x=10.5
We move all terms to the left:
1/2-0.2x-(10.5)=0
We add all the numbers together, and all the variables
-0.2x-10.5+1/2=0
We multiply all the terms by the denominator
-(0.2x)*2+1-(10.5)*2=0
We add all the numbers together, and all the variables
-(+0.2x)*2+1-(10.5)*2=0
We add all the numbers together, and all the variables
-(+0.2x)*2-20=0
We multiply parentheses
-0x-20=0
We add all the numbers together, and all the variables
-1x-20=0
We move all terms containing x to the left, all other terms to the right
-x=20
x=20/-1
x=-20
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