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2a/5-4=1
We move all terms to the left:
2a/5-4-(1)=0
We add all the numbers together, and all the variables
2a/5-5=0
We multiply all the terms by the denominator
2a-5*5=0
We add all the numbers together, and all the variables
2a-25=0
We move all terms containing a to the left, all other terms to the right
2a=25
a=25/2
a=12+1/2
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