michelle is 3 times as old as her sister tina. Tina is 4 years younger than michelle. How old is tina now?

im guessing 12?

Step-by-step explanation:

is this a multiple choice question?

if so it's a and c

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x