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2(x-4.20)=9.80
We move all terms to the left:
2(x-4.20)-(9.80)=0
We add all the numbers together, and all the variables
2(x-4.2)-(9.8)=0
We add all the numbers together, and all the variables
2(x-4.2)-9.8=0
We multiply parentheses
2x-8.4-9.8=0
We add all the numbers together, and all the variables
2x-18.2=0
We move all terms containing x to the left, all other terms to the right
2x=18.2
x=18.2/2
x=9+0.2/2
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