Question

When 8 is subtracted from a number and that difference is doubled, the result is 10. What is the number?

A) 6
B) 5
C) 18
D) 13

Answer 1

n = 13

Explanation:

Find the number

8 is subtracted from a number

(n-8)

that difference is doubled

2(n-8)

the result is 10

2(n-8) = 10

Solve the equation by dividing each side by 2

2(n-8)/2 = 10/2

n-8 = 5

Add 8 to each side

n-8+8 = 5+8

n = 13