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7b-2/5=5b-7/5
We move all terms to the left:
7b-2/5-(5b-7/5)=0
We add all the numbers together, and all the variables
7b-(+5b-7/5)-2/5=0
We get rid of parentheses
7b-5b+7/5-2/5=0
We multiply all the terms by the denominator
7b*5-5b*5+7-2=0
We add all the numbers together, and all the variables
7b*5-5b*5+5=0
Wy multiply elements
35b-25b+5=0
We add all the numbers together, and all the variables
10b+5=0
We move all terms containing b to the left, all other terms to the right
10b=-5
b=-5/10
b=-1/2
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