Answer:

1. -7

2. 15

Step-by-step explanation:

1. analyze the problem

let n be the missing number

5n + 30 = -5

5n = -30-5

5n = -35

divide both sides by 5

n = -7

2. 25 = 10 + n

(since 10 plus the number is 25) (25 is 10 more than a number)

25-10 = n

n = 15