The sum of the two digits of a number is 9. if the tens digit is one-half the units digit, what is the number? let t = the tens digit, u = the units digit, and t + u = 9. which of the following equations would complete the system? t = 1/2u u = 1/2t t - u = 1/2

Requested number is 36

Step-by-step explanation:

The first equation is as given t + u = 9

The second equation is t = (1/2)u => u = 2t

When we replace this in first equation we get:

t + 2t = 9  => 3t = 9  =>   t = 9/3 = 3

When we replace again in the

u = 2 t = 2 · 3 = 6

The requested number is  36

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a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24

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step-by-step explanation: