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2.225(x-4.2)-x=3.28
We move all terms to the left:
2.225(x-4.2)-x-(3.28)=0
We add all the numbers together, and all the variables
-1x+2.225(x-4.2)-3.28=0
We multiply parentheses
-1x+2.225x-9.345-3.28=0
We add all the numbers together, and all the variables
1.225x-12.625=0
We move all terms containing x to the left, all other terms to the right
1.225x=12.625
x=12.625/1.225
x=10+0.375/1.225
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