Question

What are the equations?

1. Two more than the product of 3 and a number is -10. Determine the number.

2. The sum of three times a number and 20 is 11. Determine the number.

3. Seven-tenths of a number is 5.6 Determine the number.

Answer 1

Explanation:

1. Let the number be a

2 + 3a = (-10)

3a = -10 - 2

3a = -12

a = -12/3 = -4.

2. Let the number be x

3x + 20 = 11

3a = 11 - 20

3a = -9

a = -9/3 = -3

3. Let the number be n

7x/10 = 5.6

x = 5.6 × 10/7

x = 56/7

x = 8