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1.25+x=7.90
We move all terms to the left:
1.25+x-(7.90)=0
We add all the numbers together, and all the variables
x+1.25-(7.9)=0
We add all the numbers together, and all the variables
x-6.65=0
We move all terms containing x to the left, all other terms to the right
x=6.65
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