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5 votes
David has $40 in his savings account. Every week, he deposits $3. Perla has $25 in her account. She deposits $6 every week. After how many weeks will David and Perla have the same amount of money?

User PrasadK
by
6.7k points

1 Answer

4 votes

Answer:

at 5 weeks

Explanation:

y = 3x + 40 (David)

y = 6x + 25 (Perla)

since both equal 'y' we can set the expressions equal and solve for 'x'

3x + 40 = 6x + 25

subtract 3x from each side to get:

40 = 3x + 25

subtract 25 from each side to get:

15 = 3x

15/3 = x

5 = x

User Robustus
by
6.6k points
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