Question

The sum is 20 the diffrence is 6

Answer 1

Answer:

sum = 13 + 7 = 20.difference 13-7 = 6

Step-by-step explanation:

x+ y = 20

6 + y+y =20

6 +2y =20

2y = 20-6

2y= 14

y=14÷2

y= 7