Answer:
19. x = 5
This is because Elise need $20, so we are going to figure out x
First, subtract 10 by both sides
2x = 10
Then, divide both sides by two to isolate the variable
x = 5
5 cars is the minimum
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20. He can stay for 11 nights.
First we subtract 80 by both sides
20x = 220
Then we isolate the variable by dividing both sides by 20
x = 11
