Question

reduce row echelon 5x+2y =3 -3x+3y =15​

Answer 1

Answer:

5x-2y=3

=>5x=3-2y

=>x=3-2y/5 --------(1)

-3x+3y=15

=>-3×(3-2y/5) +3y=15

=>-9+6y/5+3y= 15

=>-9+6y+15y/5=15

=>-9+21y=75

=>21y=84

=>y=84/21

=>y=4

put the y value of equation (1)

x=3-2y/5

=>x=3-2×4/5

=>x=3-8/5

=>x=-5/5

=>x=-1