Question

If aritmetic mean between 3a and 2a-7 is a+4 then find a

Answer 1

According to question,

(3a)+(2a-7)÷2 = a+4

5a-7÷2 = a+4

5a-7 = 2(a+4)

5a-7 = 2a+8

3a = 15

a = 5

Hope this helps!!