Question

Aplicando as propriedades das proporções resolva os sistemas.
a)x/y=6/5
x-y=15

Answer 1

x/y=6/5 -----> 5x=6y----->5x-6y=0
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5x-6y=0
x-y=15 -----> x=15+y
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5(15+y)-6y=0----->5y+75-6y=0------> -y = -75 ---> (y=75)
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x-75=15 ------> (x=90)