Use any method to solve the system of linear equations,find (x,y). $$\left\{ \begin{array} { l }
x - 3 y = 25 \
4 x + 3 y = 25
\end{array} \right.$$
A)(-10,-5)
B)(10,-5)
C)(3,-5)
D)(-5,10)
E)(-5,-10)

Question

​Use any method to solve the system of linear equations,find (x,y).​ $$\left\{ \begin{array} { l } 
x - 3 y = 25 \
4 x + 3 y = 25
\end{array} \right.$$ ​
A)​(-10,-5)
B)(10,-5)
C)​(3,-5)
D)​​(-5,10)
E)​​​(-5,-10)

Quizplus · Accepted Answer

Adding the two equations directly gives $x - 3y + 4x + 3y = 25 + 25$, simplifying to $5x = 50$, thus $x = 10$. Substituting $x = 10$ into the first equation, $10 - 3y = 25$, gives $3y = -15$, so $y = -5$.

​Use Any Method to Solve the System of Linear Equations,find {x−3y=254x+3y=25\left\{ \begin{array} { l } x - 3 y = 25 \\4 x + 3 y = 25\end{array} \right.{x−3y=254x+3y=25​

Use Any Method to Solve the System of Linear Equations,find $\left\{ \begin{array} { l } x - 3 y = 25 \\4 x + 3 y = 25\end{array} \right.$