Question

if arithmetic mean between 3a and 2a-7 is a+4 then find a

Answer 1

(3a+2a-7)/2=a+4
=>5a-7=2a+8
=>a=5

Answer 2

Answer:

a = 5

Step-by-step explanation:

Given: Mean of (3a) and (2a-7) is (a+4)

To Find: Value of a

Solution:

Mean = a+4

[(3a)+(2a-7)]/[2] = a+4

(3a+2a-7) = 2(a+4)

5a-7 = 2a+8

5a-2a = 8+7

3a = 15

a = 5

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