white chocolate costs $2.00 per bar, and dark chocolate costs $2.50 per bar. If you buy 15 bars of chocolate for $34, how many of each bar d

Question

white chocolate costs $2.00 per bar, and dark chocolate costs $2.50 per bar. If you buy 15 bars of chocolate for $34, how many of each bar did you buy?

in progress 0
Thiên Thanh 5 years 2021-08-28T16:09:10+00:00 1 Answers 34 views 0

Answers ( )

  1. kimcuc
    0
    2021-08-28T16:10:59+00:00
    Reply

    Answer:

    7 white and 8 dark bars

    Step-by-step explanation:

    x white bars

    15-x dark bars

    cost of white bars is 2 * x

    cost of dark bars is 2,5 * (15-x)

    Write an equation

    2x + 2,5 * (15-x) = 34

    2x + 37,5 – 2,5x = 34

    -0,5 x = – 3,5

    x = 7

    So we have x = 7 white bars

    and 15 – x = 15 – 7 = 8 dark bars

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )