Question

Please help, will fan and medal!

Solve the system using an augmented matrix. Show all work.
-x-3y=-17
2x-6y=-26

Answer 1

@dan815

Answer 2

I really really need help.

Answer 3

@aum

Answer 4

@Ilovecake

Answer 5

@campbell_st

Answer 6

well doesn't that mean

\[\left[\begin{matrix}-1 & -3 \\ 2& -6\end{matrix}\right] = \left[\begin{matrix}-17 \\ -26\end{matrix}\right]\]

then its the 1st row times 2 added to the 2nd row

which gives

\[\left[\begin{matrix}-1 & -3\\ 0 & -12\end{matrix}\right] =\left[\begin{matrix}-17 \\ -60\end{matrix}\right]\]

divide row 2 by -12

\[\left[\begin{matrix}-1 & 3 \\ 0 & 1\end{matrix}\right] =\left[\begin{matrix}-17\\ 5\end{matrix}\right]\]

This is just a guess, not sure if you need \[\left[\begin{matrix}x \\ y\end{matrix}\right]\] there as well.

hope it helps

Answer 7

thank youuuuu