Question

solve the pair of linear equations 3x +y=-1 and -2x+3y=19. Hence find m if their point of intersection is y=mx +3.

Answer 1

Here's your answer....


Hope it helps....!!!

Answer 2

Answer:

(x,y)=(-2,-7) and m= -1

1. Step-by-step explanation:

3x+y=-1......eqn 1

-2x+3y=19.....eqn 2

multiplying eqn 1 by 3 in order to eliminate y

9x+3y=-3.......eqn3

subtracting eqn 3 frm 2

   -2x+3y=19

    9x+3y=-3

(- ) -   -       +  

   -11x      =22

       x      =22/-11

       x      = -2  

substituting x= -2 in eqn1

we get y= 5

now,

y=mx+3

5=m(-2)=3

5= -2m+3

5-3= -2m

2= -2m

-2/2=m

-1=m

therefore m= -1