Question

2x - 3y = 21
y=3 -x​

Answer 1

x=6

Step-by-step explanation:

2x-3(3-x)=21

2x-9+3x=21

2x+3x=30

5x=30

x=6

Answer 2

(6,-3)

Step-by-step explanation:

by direct substitution, y=3-x in 2x-3y=21

2x-3(3-x)=21

5x-9=21

x=6

then y=3-6

y=-3