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15 July, 06:57

An office supply store in san diego sells 7 writing tablets and 4 pens for $6.40 also two tablets and 19 pens cost $5.40 find the price of each

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  1. 15 July, 10:51
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    7t + 4p = 6.40

    2t + 19p = 5.40

    Let’s substitute equation 1 in equation 2

    T = (6.40 - 4p) / 7

    2 (6.4-4p) / 7)) + 19p=5.4

    (12.8-8p) / 7 + 19p = 5.5

    12.8-8p + 133p = 38.5

    125p = 25.7

    P = 0.21

    Tablets = 0.79
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