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Solve each problem

3. 2/3 = 1.2/x
x = 18 <--
x = 1.8
x = 0.2
x = 10

4. 4/5 = 8/x + 2
x = 4
x = 9.5
x = 2
x = 8 <--

Create a proportion and solve.

A recipe ideas 3 cups of flour to make 48 cookies. How much flour is needed to make 72 cookies?
3/48 = 72/x, x = 1,152 cups
3/48 = x/72, x = 4.5 cups <--
3/48 = x/72, x = 2 cups
x/48 = 3/72, x = 2 cups

This is my first time posting a question on here so if someone could quickly check my answers that would be great, thanks :)

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2 answers

  1. 2/3 = 1.2/x
    x = 1.2 * 3/2
    x = 6/5 * 3/2 = 18/10 = 1.8

    use parentheses. You wrote 4/5 = (8/x) + 2
    4/5 = 8/(x + 2)
    x+2 = 8 * 5/4 = 10
    x = 8

    cookies is correct

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  2. 1 is wrong
    2 and 3 are right

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