SOLUTION: THE EQUATION OF 2 lines xxx + 2 y = 3 , 4 x-y = 12 what are the coordinates of the point of intersections

Algebra ->  Test -> SOLUTION: THE EQUATION OF 2 lines xxx + 2 y = 3 , 4 x-y = 12 what are the coordinates of the point of intersections      Log On


   

Question 420755: THE EQUATION OF 2 lines xxx + 2 y = 3 , 4 x-y = 12 what are the coordinates of the point of intersections
Answer by mananth(16949) About Me  (Show Source):
You can put this solution on YOUR website!
1 x + 2 y = 3 .............1
4 x + -1 y = 12 .............2

multiply (1)by 1
Multiply (2) by 2
1 x + 2 y = 3
8 x + -2 y = 24

Add the two equations

9 x + 0 y = 27

/ 9

x = 3

plug value of x In (1)

1 x + 2 y = 3
3 + 2 y = 3
2 y = 3 + -3
2 y = 0
y = 0