Question

Twice the difference between a number and 4 is twenty. Find the number.

А. 8
B. 9
C. 12
D. 14

Please help!!!

Answer 1

The number is 14

Explanation:

Let's call this unknown number of x:

2×(x – 4) = 20

2x – 8 = 20

2x = 20 + 8

2x = 28

x = 28/2

x = 14

Answer 2

D 14

Explanation:

Let x be the number

2(x-4) = 20

Divide each side by 2

2/2(x-4) = 20/2

x-4 = 10

Add 4 to each side

x-4+4 = 10+4

x = 14