Question

Решите систему уравнений
{4(3х-2)+2(7-4х)=20+2(у-3)
{5(2y+3)+2(6x-y)=3(5x+3)+31

Answer 1

{12x-8+14-8x=20+2y-6
{10y+15+12x-2y=15x+9+31

{4x-2y=8
{-3x+8y=25

{y=2x-4
{-3x+8(2x-4)=25

-3x+16x-32=25
13x=57
x=57:13
x=4  5/13
y=4  10/13
Ответ: (4  5/13;  4  10/13)