MARKING AS BRAINLIEST PLUS MANY POINTS

Mathematics

2 answers:

yulyashka [42]3 years ago

7 0

This is easy
since there’s no examples on the sides that’s okay the one that has a 2 on is a good starter bc u see all of the sides and almost the same but the top and bottom aren’t so we know that the left and right are 2x let’s figure out what the top and bottom are
2x2x2x2=16
so it’s 16

marshall27 [118]3 years ago

5 0

Answer:

2x little 2on top

Step-by-step explanation:

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<em>Step-by-step explanation</em>

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$\begin{gathered} 3x+2y=12\text{ \lparen eq. 1\rparen} \\ 5x-y=7\text{ \lparen eq. 2\rparen} \end{gathered}$

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$\begin{gathered} 3x+2y-2y=12-2y \\ 3x=12-2y \\ \frac{3x}{3}=\frac{12-2y}{3} \\ x=\frac{12}{3}-\frac{2}{3}y \\ x=4-\frac{2}{3}y\text{ \lparen eq. 3\rparen} \end{gathered}$

Substituting equation 3 into equation 2 and solving for y:

$\begin{gathered} 5(4-\frac{2}{3}y)-y=7 \\ 5\cdot4-5\cdot\frac{2}{3}y-y=7 \\ 20-\frac{10}{3}y-y=7 \\ 20-\frac{13}{3}y=7 \\ 20-\frac{13}{3}y-20=7-20 \\ -\frac{13}{3}y=-13 \\ (-\frac{3}{13})\cdot-\frac{13}{3}y=(-\frac{3}{13})\cdot-13 \\ y=3 \end{gathered}$

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