#420
because 70x4=420 within 300 and 500 and is greater than 400 which is a multiple of 100
Answer:
x=8
Step-by-step explanation:
Let x=balloon swords
let x+4=balloon dogs (four more than x is x+4)
let x+7=balloon hats (three more than x+4 is x+7)
the answer is x+7
I don't know how to correctly explain the second answer (although I do know that it is 1)
