Respuesta :

Let
x-------> larger number
y------> smaller number

we know that
x=3y-------> equation 1
x+y=48----> equation 2
substitute 1 in 2

[3y]+y=48------> 4y=48-----> y=48/4-----> y=12
x=3y----> x=3*12-----> x=36

the answer is
the two numbers are 36 and 12

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