Question

Solve a=b+2
2a-b=7
and hence find out 2a+b
​

Answer 1

Step-by-step explanation:

2(b+2)-b=7

b=3,a=5

2a+b=13

Answer 2

Solution

a=b+2--------(1)

2a=b+7------(2)

(2)-(1) gives,

2a-a=b+7-b-2

a=5

Substitute for a in (1),

5=b+2

b=3

To find 2a+b

=2(5)+3

=13

Answer is 13