Answer:
C
Step-by-step explanation:
Add the hundreds together
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First add 5 to right side

Next , to cancel the 7, you need to multiply by 7 on both sides
the answer is B because to get the total cost, first divide 450 by 50. This gives us 9. We then multiply 9 by $600 to get a total of $5400.
the answers are as follows C B F