Solving with Proportions?

3 problems..

1: b/12.8 = 9/3:2

2. 0.5/2.4 = c/15

3. 7(x-6) = 3x - 2

help and show me the steps?

Update:

Sorry I just really hate decimals ;3;

1 Answer

Relevance
  • Sen...
    Lv 6
    8 years ago
    Favorite Answer

    1.

    b/12.8 = 9/3:2

    b/12.8 = 9/1,5

    b x 1,5 = 12.8 x 9

    b x 1,5 = 115.2

    b = 115.2 : 1.5

    b = 76.8

    Check:

    76.8 : 12.8 = 9 : 1.5

    6 = 6

    Ta-da ;)

    The second one is easy. Same procedure.

    3.

    7(x-6) = 3x - 2

    7x - 42 = 3x - 2

    7x - 3x = -2 + 42

    4x = 40

    x = 40 : 4

    x = 10

Still have questions? Get your answers by asking now.