Răspuns
Explicație pas cu pas:
(x - y) / y = 3/4
x/y - y/y = 3/4
x/y - 1 = 3/4
x/y = 3/4 + 1 = 3/4 + 4/4 = 7/4
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(2x+y)/y =73/15
2x/y + 1 = 73/15
2x/y = 73/15 - 1 = 73/15 - 15/15 = 58/15
x/y = 29/15
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(3x-y)/2y = 9/4
3x/2y - 1/2 = 9/4
3x/2y = 9/4 + 1/2 = 9/4 + 2/4 = 11/4
x/y = 11/4 x 2/3 = 22/12 = 11/6
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x+y/x-y = 7/3
3x + 3y = 7x - 7y
7y + 3y = 7x - 3x
10y = 4x
x/y = 10/4 = 5/2