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(12.1+a)/4.9=7.71
We move all terms to the left:
(12.1+a)/4.9-(7.71)=0
We add all the numbers together, and all the variables
(a+12.1)/4.9-(7.71)=0
We add all the numbers together, and all the variables
(a+12.1)/4.9-7.71=0
We multiply all the terms by the denominator
(a+12.1)-(7.71)*4.9=0
We add all the numbers together, and all the variables
(a+12.1)-37.779=0
We get rid of parentheses
a+12.1-37.779=0
We add all the numbers together, and all the variables
a-25.679=0
We move all terms containing a to the left, all other terms to the right
a=25.679
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