{2(4x-5)-3(3+4y)=5
{7(6y-1)-(4+3x)=21y-86

[2(4х - 5 ) - 3 ( 3 + 4у) =21у - 86

[517(6у - 1 ) - (4+ 3х) =21у - 86

[8х-33у=-67

[-3х+3081у =435

[24x-99y=-201

[-24x+24648y=3480

24549y=3279

y=Дробь там 1093/8183

8x-33x* Дробь 1093/8183=-67

x=- 64024/8183

(x,y)=(-64024/8183,1093/8183)

-97255/1169=-97255/1169=-97255/1169

(x,y)= (-64024/8183, 1093/8183)