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11 July, 05:31

Solve for x.

3/8 = 12/x

x/5 = 10/12

4/6 = x/12

4/9 = 7/x

5/11 = 9/x

2/7 = x/21

7/8 = x/16

3/5 = 9/x

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Answers (1)
  1. 11 July, 05:40
    0
    First one

    remember

    a/b=c/d also can be written as

    ad=bc

    so

    first one can be rewritten as

    3x=96

    divide both sides by 3

    x=32

    2nd ones we can just times both sides by 5 to get

    x=50/12

    3rd one we times 12 both sides to get

    x=8

    4th one we translate to

    4x=63

    divide by 4

    x=63/4

    5th one we translate to

    99=5x

    divide by 5

    99/5=x

    6th one we times 21 both sides

    6=x

    7th one we times both sides by 16

    14=x

    last one we translate to

    45=3x

    divide 3

    15=x
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