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Math word problem?

Science & Mathematics by Anonymous 2018-07-17 19:04:47

Social Science

Math word problem?

4 answers

At a certain restaurant, there are 25 tables, and each table has either 2 or 4 chairs. If a total of 86 chairs accompany the 25 tables, how many tables have exactly 4 chairs? Show your work

  • Anonymous

    25*2=50 86-50=36 36/2=18 25-18=7 17*2+18*4

  • Anonymous

    Tables use at least 2 chairs. 25 tables require 50 of the 86 chairs. The remaining 36 chairs are supplied 2 per table by 18 tables.

  • Anonymous

    t + f = 25 2t + 4f = 86 2t + 2f = 50 --------------------- 2f = 36 f = 18 18 tables have exactly 4 chairs

  • Anonymous

    x = tables with 4 chairs y = tables with 2 chairs Number of tables: x + y = 25 → y = 25-x Number of chairs: 4x+2y = 86 → 4x + 2(25-x) = 86 4x - 2x = 86-50 2x = 36 x = 18 18 tables have 4 chairs

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