Question

the sum of two numbers is 13 and their difference is 3

Answer 1

Answer:

x+y = 13         x-y = 3

add, 2x = 16

        x = 8

        y = 5

Answer 2

Answer:

a+b=13 ---1

a-b=3 ----2

from- 1

a=13-b

putting in- 2

13-b-b=3

13-2b=3

-2b=-10

b=5

hence a=8

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