Question

solve the pair of linear equation 3x+y=-1 and -2x+3y=19 and find m so that y=mx+3 by substitution method only​

Answer 1

Step-by-step explanation:

[-(3x+y) =-1] ×3~ equation 1 -2x+3y=19~ equation 2

add both

-9x-3y=+3

-2x+3y=19

----------------

-11y= 22

therefore y=(-2)

putting y=(-2) in equation 2

-2x+3(-2)=19

-2x-6=19

-2x= 24

x= -12