Question

Write down the pair of integers whose:

(a) Sum is -4 (b) Sum is 0
(c) Difference is 2 (d) Difference is -6

Answer 1

A: x+y=-4

B: x+y=0

C: x-y=2

D: x-y=-6

Explanation:

On a and b, we are adding 2 unknown values, so we have x+y=-4 for a and x+y=0 for b. On c and d, we are subtracting 2 unknown values, so we have x-y=2 for c and x-y=-6 for d

Answer 2

Explanation:

(a) Sum is -4

4 + (-8)

4 - 8

-4

(b) Sum is 0

1 + (-1)

1 - 1

0

(c) Difference is 2

10 - 8

2

(d) Difference is -6

10 - 16

-6