Question

x = 3y , 3x + 4y = 20 ​

Answer 1

$x = 3y \\ 3x + 4y = 20 \\ 3(3y) + 4y = 20 \\ 9y + 4y = 20 \\ 13y = 20 \\ y = \frac{20}{13} \\ y = 1.5$

$x = 3y \\ x = 3 \times 1.5 \\ x = 4.5$

Answer 2

Answer:

x=3y

3x+4y=20

3(3y)+4y=20

9y+4y=20

13y=20

y=

13

20

y=1.5

\begin{gathered}x = 3y \\ x = 3 \times 1.5 \\ x = 4.5\end{gathered}

x=3y

x=3×1.5

x=4.5

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Step-by-step explanation:

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