Dewayne is comparing two checking accounts. One has a monthly fee of $7 and a per-check fee of $0.30, and the other has a monthly fee of $4 and a per-check fee of $0.40. What is the minimum number of checks Dewayne needs to write for the first bank to be a better option?

Question

Mister

Mathematics

29 August, 14:28

Dewayne is comparing two checking accounts. One has a monthly fee of $7 and a per-check fee of $0.30, and the other has a monthly fee of $4 and a per-check fee of $0.40. What is the minimum number of checks Dewayne needs to write for the first bank to be a better option?

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Answers (2)

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Jaylynn · Answer 1

7 + 0.30x = 4 + 0.40x

subtract 4 from each side

3+0.30x = 0.40x

subtract 0.3x from each side

3 = 0.10x

divide both sides by 0.10

3 / 0.10 = 30

30 checks would make both accounts equal

so he would need to write 31 checks for the first one to be better.

Squirt · Answer 2

7 + 0.30x = 4 + 0.40x

subtract 4 from each side

3+0.30x = 0.40x

subtract 0.3x from each side

3 = 0.10x

divide both sides by 0.10

3 / 0.10 = 30

30 checks would make both accounts equal

so he would need to write 31 checks for the first one to be better.