Find two numbers if their difference is 16 and their ratio is 5:7.
Lauren H.
answered • 10/06/18
Experienced High School Chemistry Teacher
their difference is 16
x - y = 16, x = 16 + y
their ratio is 5:7
x/y = 5/7
substitute:
(16 + y)/y = 5/7
16 + y = (5y)/7
112 + 7y = 5y
2y = -112
y = -56
x - y = 16, so x - -56 = 16,
x = -40
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