Math

O God I hate word problems! Is there any mechanical way to memorize word problems?
Can anyone just change this Following word prob to equations pls. I can do the rest!
Sam invested $4500, part at 7%, the rest at 8 1/2%. After one year, the interest earned on 7% investment was $150 less than the interest earned on the 8 1/2%. How much was invested T each rate?
Thanks alot!

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  1. $1500 invested in 7% one and
    $3000 invested in 8.5% one

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