Question

прошу вас прошу!!!!!!!!!!!!! ​

Answer 1

20x-18x-12y+6y=2x-6y=2(x-3y)

3x-y=2,1

y=3x-2,1

x=0,7-y/3

2(x-3y)=2(0,7-y/3)=1.4-0,5y

2(x-3y)=2(x-3(3x-2,1))=2x-18x+12,4=-16x+12,4