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30 October, 09:15

A textbook store sold a combined total of 297 chemistry and physics textbook in a week. The nimber of chemistry textbooks sold was 83 more than the number of physics textbooks sold. How many textbooks of each type were sold

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  1. 30 October, 10:05
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    make physics textbooks x

    297=x+x+83

    297=2x+83

    subtract 83 on both sides

    214=2x

    divide by 2 on both sides

    107=x

    107 physics textbooks

    107+83=190

    190 chemistry textbooks
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