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42+1.3x=122-1.2
We move all terms to the left:
42+1.3x-(122-1.2)=0
We add all the numbers together, and all the variables
1.3x+42-(120.8)=0
We add all the numbers together, and all the variables
1.3x-78.8=0
We move all terms containing x to the left, all other terms to the right
1.3x=78.8
x=78.8/1.3
x=60+0.8/1.3
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