Question

if a+b = 28 and a-b =10 then b ?

Answer 1

Answer:

a=19 and b=9... simultaneously solve the equation

Step-by-step explanation:

see the pic

Answer 2

Answer:9

Step-by-step explanation:

a+b=28 ........(1). a-b=10.......(2)

a=28-b .....(3)

Value of (3) put in (2)

(28-b)-b=10

28-2b=10

28-10= 2b

18=2b

So.

b=9 ✓✓