Answer :
Answer:
x + 18 = 21 or
2x + 2*18 = 42
Step-by-step explanation:
Let x = cost of 1 desert
x + 18 = 21 dollars Subtract 18 from both sides
x + 18 - 18 = 21 - 18
x = 3
Or you could work with the 42 dollars
2x + 18*2 = 42
Answer: MARK ME BRAINEST
x + 18 = 21
Step-by-step explanation:
x = cost of 1 desert
x + 18 = 21 dollars
x + 18 = 21
-18 -18
x = 3