Question

Math riddle! Correct answer gets brainliest!

Answer with what x and y are equal to.

Answer 1

Answer:

$\displaystyle [9, 4\frac{1}{2}]$

Step-by-step explanation:

I figure these exercises out by numeric association. I see a 3, so I know right away that there might be a 9 somewhere. So, you start by plugging 3 in for $\displaystyle x,$ THEN plug $\displaystyle 1\frac{1}{2}$ in for $\displaystyle y$ sinse there are twise the quantity of $\displaystyle y$ than there are of $\displaystyle x.$ Now, doing so will give you $\displaystyle 24 ≠ 18.$ This tells you to try another pattern, so go with plugging $\displaystyle 4\frac{1}{2}$ in for $\displaystyle y$ and $\displaystyle 9$ in for $\displaystyle x$. Doing so gives you what you are looking -- $\displaystyle 36 = 36.$ Therefore, the association wourked perfectly. ☑

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Answer 2

That locked sign defines that both sides are equal.

The equations are

• 2x=4y=>x=2y--(1)
• 3x+9=2x+4y=>x+9=4y=>x=4y-9--(2)

From (1) and (2)

$\\ \rm\Rrightarrow 4y-9=2y$

$\\ \rm\Rrightarrow 2y=9$

$\\ \rm\Rrightarrow y=9/2=4.5$

Put in eq(1)

• x=2(4.5)=9

Hence

• (x,y)=(9,4.5)