SOLUTION: I dont understand the following: solve by graphing
x+y=7
2x-y=5
The instructions also say if you solve the system and the variables both add out, you need to tell whether the sy
Algebra.Com
Question 88314: I dont understand the following: solve by graphing
x+y=7
2x-y=5
The instructions also say if you solve the system and the variables both add out, you need to tell whether the system consists of lines that coincide (infinite solutions) or parallel lines(no solution)
Answer by rapaljer(4671) (Show Source): You can put this solution on YOUR website!
Just add the two equations together, and the y terms subtract out:
x+y=7
2x-y=5
--------------
3x=12
x=4
Substitute back into the first equation:
x+y=7
4+y=7
y=3
Check by substituting both values in the second equation:
2x-y=5
2*(4)-3=5
It checks.
The solution is the point (4,3).
R^2
RELATED QUESTIONS
i need help with-
x+y=9
y=2x when the directions say solve by graphing and... (answered by gonzo)
I need help with these problems, most of them do need to be graphed. I want to thank the (answered by Edwin McCravy)
Can you please help me solve the equation...instructions...solve the system by graphing.
(answered by checkley75)
Solve each system by graphing.
x + y = 4
2x - y = 5
My notes from class show how... (answered by Alan3354)
Solve the linear system by graphing.
2x+y= -8
-x + y=4
Please help. I don't... (answered by only4christ2)
Could you please assist me with the following problem?I have to solve the system by... (answered by stanbon)
I am having a hard time with sovling the following problem. I need to solve the following (answered by Earlsdon,checkley75)
How do I solve the system of equations by graphing: y=x-5 and -2x... (answered by Alan3354)
I am trying to solve the system by graphing.
I must solve for x and Y.
x-y=8
2x+y=7
I (answered by richwmiller)