Question

a + 3b = 5
7a - 8b = 6​

Answer 1

Answer:

a=2

b=1

Step-by-step explanation:

a + 3b = 5;

a = 5 - 3b .............(i)

7a - 8b = 6 ...........(ii)

Replacing the value of "a" as in equation (i) in equation (ii), we get

7 (5 - 3b) - 8b = 6

35 - 21b - 8b = 6

35-6 = 21b + 8b

29 = 29b or b = 1

Replacing the value of "b" in equation (i), we get

a = 5 - 3 × 1 or a = 5-3=2