Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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Question 168253: Use the graphing method to solve the system.
7x+3y=5 2x-y=-1
3x-22y=12 x+2y=7 : Use the graphing method to solve the system.
7x+3y=5 2x-y=-1
3x-22y=12 x+2y=7
Answer by jojo14344(1026) About Me  (Show Source):
You can put this solution on YOUR website!
7x+3y=5-------------------> A
3x-22y=12-----------------> B
2x-y=-1 ------------------> C
x+2y=7 -------------------> D
In A:
3y=5-7x ---> y=(5/3)-(7/3)x
In B:
22y=3x-12 ---> cross(22)y/cross(22)=(3x-12)/22
y=(3/22)x-(12/22) ---> y=(3/22)x-(6/11)
In C:
y=2x+1
In D:
2y=7-x ---> cross(2)y/cross(2)=(7-x)/2
y=(7/2)-(x/2)
See graph:
drawing(400,400,-5,5,-5,5,graph(400,400,-5,5,-5,5,(5/3)-(7/3)x,(3/22)x-(6/11),2x+1,(7/2)-(x/2))))
*Note:
RED Line = A; GREEN Line= B; BLUE Line=C; PURPLE Line=D
.
Thank you,
Jojo