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Rezolvati exercitiul urmator:

1) Aflati x/y (x supra y) daca stim 2x+5y/4x-y = 9/7 .


Răspuns :

2x+5y/4x-y=9/7
9(2x+5y)=7(4x-y)
18x+45y=28x-7y | -45y
18x=28x-7y | +28x
46x=7y
x/y=46/7

Sper ca te-am ajutat !!
2x+5y/4x-y=9/7
9(2x+5y)=7(4x-y)
18x+45y=28x-7y | -45y
18x=28x-7y | +28x
46x=7y
x/y=46/7