Mathematics, 02.09.2020 01:01 aj2869
Solve the system by using elementary row operations on the equations. Follow the systematic elimination procedure
x1+4x2 =11
2x1+7x2=18
Find the solution to the system of equations.
Answers: 2
![\left[\begin{array}{ccc}1&4\\2&7\\\end{array}\right] \left[\begin{array}{ccc}x\\y\\\end{array}\right] = \left[\begin{array}{ccc}11\\8\\\end{array}\right]](/tpl/images/0737/5711/75c66.png)
![[AB] = \left[\begin{array}{ccc}1&4&11\\2&7&18\\\end{array}\right]](/tpl/images/0737/5711/0a30b.png)
![[AB] = \left[\begin{array}{ccc}1&4&11\\0&-1&-4\\\end{array}\right]](/tpl/images/0737/5711/ebeab.png)
![\left[\begin{array}{ccc}1&4\\0&-1\\\end{array}\right] \left[\begin{array}{ccc}x\\y\\\end{array}\right] = \left[\begin{array}{ccc}11\\-4\\\end{array}\right]](/tpl/images/0737/5711/9ec18.png)
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