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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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Math 7a using number sense to solve equations
Anika [276]
Simple...

you have: \frac{n}{3} =12


and

\frac{n}{3} =-12

To solve for....\frac{n}{3} =12

Multiply to remove the denominator-->>

3*  \frac{n}{3} =12*3

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Then-->>>

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Do the same thing-->>

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Thus, your answer.



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4 years ago
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Step-by-step explanation:

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