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4.5/(2.3+2.7)=a
We move all terms to the left:
4.5/(2.3+2.7)-(a)=0
We add all the numbers together, and all the variables
-a+4.5/5=0
We add all the numbers together, and all the variables
-1a+4.5/5=0
We multiply all the terms by the denominator
-1a*5+4.5=0
Wy multiply elements
-5a+4.5=0
We move all terms containing a to the left, all other terms to the right
-5a=-4.5
a=-4.5/-5
a=3/3.3333333333333
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