Question

Find two numbers a and b whose sum a+b is 8 and whose difference a−b is 12 .

Answer 1

Answer:

b= –2 and a=10 and yeah this is correct

Explain:

a+b=8

a=8–b... (I)

now put that in second equation

a–b=12

8–b–b=12. (from eq no I)

–2b=12–8

b=–2

a=10