Question

3x+2y=9,5x-y=18 substitution method

Answer 1

Answer:

X=5.

and

Y=7.

hope this answer is helpful to you

Answer 2

Answer:

x=9,y=-18

Explanation:

3x+2y=9   -[1]

x-y=18       -[2]

or, x=y+18.......from eqn 2

substituting in eqn 1:

3(y+18) +2y=9

3y +54 +2y=9

5y= -45

or, y= -9

now, x=y +18

or, x= -9+18=9