In the equation (2)/(3)b+5=20-b , in the second step of the picture down below, why did (2)/(3) change to (5)/(3) ?

Question

in the equation
`(2)/(3)b+5=20-b` , in the second step of the picture down below, why did
`(2)/(3)` change to
`(5)/(3)` ?

Answer 1

2/3 changed to 5/3 because in the 2nd step, b was added to each side. A number 1 is assumed in front of the b;

Explanation:

Therefore, 2/3 becomes 5/3 because 2/3 + 1 = 1 2/3 = 5/3. I just simplified.