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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?

Respuesta :

LammettHash
The second condition tells you that [tex]t[/tex] is half the size of [tex]u[/tex], so [tex]t=\dfrac12u[/tex], which could be rewritten in several ways. In standard form, that would be [tex]2t-u=0[/tex].
mnhlabatsi7

Answer:t=[tex]\frac{u}{2}[/tex]

Step-by-step explanation:

First equation t+u=9

Second equation t = [tex]\frac{u}{2}[/tex] since the number in the tens position is one half of the one in the units. So if you divide u by two, you should have one t, as the equation states