Question

the sum of ages of A and B is 35 years and the difference in their ages is 5 years what are their ages

Answer 1

Answer:

A =20 years , B = 15 years

Step-by-step explanation:

condition 1st :

A+B = 35

A = 35 - B -----------equation 1st

condition 2nd :

A - B = 5

if A = 35 - B by equation 1 then

(35 - B ) - B = 5

35 -B -B = 5

35 - 2B = 5

35 - 5 = 2B

30 = 2B

B = 30/2

B = 15 years

in equation 1st

A = 35 - B

if B = 15 then

A = 35 - 15

A = 20 years