Question

3. Three less than twice a number is 15. What is the number?

a.
b.
x= -6
x=6
c. x=-9
d. x=9

Answer 1

Answer:
`x=-6`

Explanation:

Three (3) less than (-) twice (2) a number (x) is (=) 15

`3-2x=15`

`-2x=15-3\\-2x=12\\x=(12)/(-2)\\ x=-6`

Answer 2

x =9

Explanation:

Let x = be the number

2x -3 =15

Add 3 to each side

2x-3 +3 =15 +3

2x = 18

Divide each side by 2

2x/2 =18/2

x =9