Question

If a+b=-2 and a-b=12find b

Answer 1

Answer:

b= -7

Step-by-step explanation:

a+b= -2

a-b=12

adding both the equations,

2a=10

a=5

substituting in the equation,a-b=12

5-b=12

-b=12-5

-b=7

b= -7