Question

8x-9y-21=0 3x-2y-12=0

Answer 1

х=21+9у/8

3*(21+9у)/8 -2у-12=0

63+27у-16у-96=0

11у=33

у=3

х=6

Answer 2

3*(21+9y)/8-2Y-12=0

63+27 Y -96=0

14Y=33

Y=3

X=6