Solve the system by Gauss-Jordan elimination, if possible. If $( x , y )$ is the solution to the system, give the value of $x$.
$$\left\{ \begin{array} { r }
x - 2 y = 35 \
y = - 15
\end{array} \right.$$
A) $- 6$
B) 5
C) 6
D) $- 5$
E) no solution

Question

Solve the system by Gauss-Jordan elimination, if possible. If $( x , y )$ is the solution to the system, give the value of $x$.
$$\left\{ \begin{array} { r } 
x - 2 y = 35 \
y = - 15
\end{array} \right.$$
A) $- 6$
B) 5
C) 6
D) $- 5$
E) no solution

Quizplus · Accepted Answer

Given $y = -15$, substitute this value into the first equation: $x - 2(-15) = x + 30 = 35$. Solving for $x$, we find $x = 35 - 30 = 5$.

Solve the System by Gauss-Jordan Elimination, If Possible (x,y)( x , y )(x,y)

Solve the System by Gauss-Jordan Elimination, If Possible $( x , y )$