Question

Jorge used a graph to determine a solution to the following system of equations: x + y = 92 and y = 3x – 4 Jorge’s answer is (67, 25). Is he correct? Explain how to check if his solution is correct without using a graph.

Answer 1

Answer:

x= 92 - y

y= 3(92-y) - 4

y=276 - 3y - 4

4y=272

y=272/4

y=68

x=92-68=24

Answer 2

Answer:

Jorge’s solution is incorrect.  The correct solution is (24, 68) . The point should make both equations true.  Jorge’s solution made y = 3x – 4, a false equation

Step-by-step explanation:

:)