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ivanzaharov [21]
3 years ago
15

Please help!! I don’t understand how to do this problem

Mathematics
1 answer:
Oxana [17]3 years ago
5 0

Answer:

D.

Step-by-step explanation:

y  = 3x \\ \frac{y}{3} = x \\   \\  \frac{3y}{3}  + 2y = 45 \\ y + 2y = 45 \\ 3y = 45 \\ y =  \frac{45}{3} \\ y = 15 \\  \\ x =  \frac{y}{3}  \\  =  \frac{15}{3}  \\  = 5

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