Question

Suppose you have $55 in your account. You start saving $10 each week. Your friend has $20 in her account and is saving $15 each week.

A) When will you and your friend have the same amount of money in your accounts?
B) How much money will each of you have?
let number of weeks be w

solve
10w + 55 = 15w + 20

take it from there
10w+55=15w+20
-10w -10w
55=5w+20
-20 -20
35=5w
/5 /5
7=w

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