SOLUTION: Hi sir i need help SOLVE GRAPHICALLY:- 4x+5y=7 3x-4y=8 I am getting (y=7-4x/5 & x=8+4y/3) Pls help

Algebra ->  Linear-equations -> SOLUTION: Hi sir i need help SOLVE GRAPHICALLY:- 4x+5y=7 3x-4y=8 I am getting (y=7-4x/5 & x=8+4y/3) Pls help      Log On


   

Question 111176: Hi sir i need help
SOLVE GRAPHICALLY:-
4x+5y=7
3x-4y=8

I am getting (y=7-4x/5 & x=8+4y/3)
Pls help
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
4x%2B5y=7
3x-4y=8
:
Easiest way is to write the equations in slope-intercept form:
:
5y=-4x%2B7
y=-4x%2F5%2B7%2F5, and
:
-4y=-3x%2B8
y=3x%2F4-2
:
Now, graph the two lines by noting that the first equation has a y-intercept of 7/5 and a slope of -4/5 (5 right, 4 down). The second equation has a y-intercept f -2 with a slope of 3/4 (4 right, 3 up).
:
graph%28400%2C400%2C-3%2C3%2C-3%2C3%2C-4x%2F5%2B7%2F5%2C3x%2F4-2%29
:
The two lines cross at about (2.2,-1/3), roughly speaking.