Question

a=3b-4
b=6-2a

solve this problem by substitution method​

Answer 1

Hi there!

a=3b-4 ----(1)

b=6-2a-----(2)

Substitute b in equation (1)

a = 3(6-2a)-4

a=18-6a-4

a+6a=18-4

7a=14

$a = \frac{14}{7} \\ \\ a = 2$

Now, put a=2 in (2)

b=6-2(2)

b=6-4

b=2

You can check answers by putting both value in equation (1) and (2).

Thankyou :)