# Walt made an extra $10,000 last year from a part-time job. He invested part of the money at 8% and the rest at 7%. He made a total of $760 in interest. How much was invested at 7%?

$4000

I'm not sure how the backstory affects the calculations, but Kudos to you, fictional Walt, for managing to work two jobs and save for the future at that rate. Where are you finding those kinds of rates these days?

By multiplying the first equation by.08 and subtracting the second, we can find the value of x.

That's $4000 at 7% and$6000 at 8%.

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$4,000 was invested at 7%.

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