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Lila and Nina are at college and spending their savings. Nina has $1,500 and is spending $80 a week. Lila has $600 and is spending $20 a week. Write and solve an equation that will figure out how long it will take for them to have the same amount of money.

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Foxzy0

So you can take this as a sequence. For Nina the term would be 1,500 and second be 1,420. So the equation for it would be  -80n + 1580. For Lila it would be -20n + 620. 1,500 and 600ths highest common factor is 300. So it would take Nina 16 weeks. For Lila it would take 16 as well.

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