Question

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Answer 1

6/4 = (x+3+6) / x+4

4*(x+9) = 6*(x+4)

4x+36 = 6x +24

4x -6x = 24 -36

-2x = -12   x= -12/-2

x=  6

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7,5 /y = 15/6

y/7,5 = 10/15

y= 7,5 * 10/15

y= 75/15

y= 5