Question 428899: can I have some step by step examples of how to solve linear systems using elimination and graphing it out. Also solving linear systems by multiplying first and graphing. I appreciate any help my daughter has a retest tomorrow and is lost and i am trying to help her,that is why I,myself need a step by step explanation it is for me to understand so i can teach her.
Answer by mananth(16946)   (Show Source):
You can put this solution on YOUR website! 2x+3y=8 .............1
x-5y=17 .............2
Eliminate y
multiply (1)by 5
Multiply (2) by 3
10x+5y=40
3x+2y=51
Add the two equations
13x=91
/13
x=7
plug value of x in (1)
2x+3y=8
14+3y=8
3y=8+-14
3y=-6
y=-2
(7,-2) is the solution.
2x+3y=8 .............1
x=0 , y=8/3 ( 0,8/3)
y=0, x=4 (4,0)
x-5y=17 .............2
x=0,y=-17/5 (0,-17/5)
y=0,x=17 (17,0)
Plot two points generated from each equation (1) & (2) draw the line graph
The intersection is the solution
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