Question

How to get the B by itself

Answer 1

(a + b + c)/3 = A

(a + b + c)/3 x 3 = A x 3

a + b + c = A(3)

 a- a + b + c - c = A(3) - a - c

b = A(3) - a - c

hope this helps


( i dont know if the A is suppose to be there or not sorry)