Verified answer

x-1=2+3y; 5x-7=y+9

x=3y+3; 5(3y+3)-7=y+9

x=3y+3; 15y+15-7=y+9

x=3y+3; 15y+8=y+9

x=3y+3; 15y-y=9-8

x=3y+3; 14y=1

y=1/14; x=3*1/14+3

y=1/14; x=3/14+42/14

y=1/14; x=45/14

Ответ: (45/14; 1/14)

Verified answer

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