Решения уравнений 9x(y-5)+4x(6-y)=3+3x(y+20)-2y и 5x(y-1)-3x(y-2)=7-y+3

Question

Решения уравнений 9x(y-5)+4x(6-y)=3+3x(y+20)-2y и 5x(y-1)-3x(y-2)=7-y+3

Answer 1

9x(y-5)+4x(6-y)=3+3x(y+20)-2y
9ху-45х+24х-4ху=3+3ху+60х-2у
2ху-81х