Carla is 3 times older than her sister megan. eight years ago, carla was 18 years older than her sister. what is megan's age? i need writing the equation out and answering

Let C be the age of Carla and M be the age Morgan. Their age today is:

C= 3.M, but 8 years. To find the age of Morgan you have to subtract 8 years from her today's age. Back to the equation C=3.M==>
C-8 = 3(M-8)
18 = 3M - 24 M==> 3M =24+18 ==> 3M = 42 & M= 14, then Carla= 42

The answer is a

Step-by-step explanation:

On a coordinate plane, a line goes through points (negative 1, negative 2) and (0, 1).