Question

question 3 of 10, step 1 of 1
use gaussian elimination and back - substitution to solve the following system of equations. if there is a solution, write your answer in the format (x, y).
\

$$\begin{cases}3x - 5y = 25\\\\9x - 15y = 78\\end{cases}$$

indicate the number of solutions to this system. state the solution, if one exists, and if there are infinitely many solutions, express the solution set in terms of one of the variables.
selecting an option will display any text boxes needed to complete your answer.
\bigcirc no solution
\bigcirc one solution
\bigcirc infinitely many solutions

Explanation:

Step1: Scale first equation

Multiply first equation by 3:
$$3\times(3x - 5y) = 3\times25$$
$$9x - 15y = 75$$

Step2: Compare with second equation

Subtract scaled eq from second eq:
$$(9x - 15y) - (9x - 15y) = 78 - 75$$
$$0 = 3$$

Answer:

○ No Solution