Answer:
x + 2 + 3x = 30
Step-by-step explanation:
Since Ginny's car is 2 more than 3 times the length of Zach's car, lets say Zach's car is x. 2 more means (+2) and three times means (3x) so Then Ginny's car would be 3x + 2.
If the sum of the lengths of both cars is 30 inches, add both cars.
x + 2 + 3x = 30