Answer:
Carla has 28 students in her class and Linda has 21
Step-by-step explanation:
Because I just took 49 and substracted a number about halfway and then since carla and 7 more students you just had to find the number that has seven more than linda.
No
Plug in (-2, -6) to see if it's the solution or not
3(-2) + 18(-6) ? -14
-6 + ( -108) ? -14
-114 ≠ -14
Answer is NO