SOLUTION: (1) Solve the system of equation by graphing: x+y=4 y-x=4 (2)x-3y=-3 x+3y=9 (3) Solve by substitution method 7x+3y=-15 x=7-5y

Algebra ->  Graphs -> SOLUTION: (1) Solve the system of equation by graphing: x+y=4 y-x=4 (2)x-3y=-3 x+3y=9 (3) Solve by substitution method 7x+3y=-15 x=7-5y      Log On


   



Question 604985: (1) Solve the system of equation by graphing:
x+y=4
y-x=4

(2)x-3y=-3
x+3y=9
(3) Solve by substitution method
7x+3y=-15
x=7-5y

Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
graphing---check to see if i wrote your problem down right
x+y=4
y-x=4 answer: y=4-x
y=x+4
x-3y=3 y=x/3-1
x+3y=9 y=3-x/3
solve substitution" 7x+3y=15
x=7-5y answer:y=17/16
x=27/16