Question

If B+2(a+1)=c then a+1

Answer 1

B+2(a+1)=c
2(a+1)=c-B
a+1=(c-B)/2
Its pretty simple process actually

Answer 2

If b+2(a+1) = c, find the value of a+1

Subtract b from both sides: b+2(a+1) - b = c - b
2(a+1) = c - b
Divide both sides by 2:
a+1 = (c - b) /2