1) What is the value of the x in the solution to the system of linear equations below?
y=4x-17
3x+y=4
A) x= -5
B) x= -3
C) x= 5
D) x= 3

Question

1) What is the value of the x in the solution to the system of linear equations below? 
                                                y=4x-17
                                                3x+y=4
A) x= -5
B) x= -3
C) x= 5
D) x= 3

mathmale · Answer

A more appropriate first question would be:  Which method or methods of solving systems of linear equations would be best suited to solving this particular problem for x?

Substitution?
Elimination by addition/subtraction?
Graphing?
Matrices?

You are asked to determine x only, so why not look for a way to eliminate the variable y?

anonymous · Answer

3. The equation of two lines are 7x-y=-1 and y= 5x + 3. What is the value of the y in the solution for this system of linear equations? 

A) y = -7
B) y= -2
C) y= 1 
D) y= 8

anonymous · Answer

apparently $y=8$ http://www.wolframalpha.com/input/?i=7x-y%3D-1+and+y%3D+5x+%2B+3

anonymous · Answer

What about the first one?

anonymous · Answer

@satellite73