(1)
{х-8у-17=0
{3x+4y-23=0

(2)
{8x-9y-21=0
{3x-2y-12=0
N1548
(2)
{0.3x-0.5y=0
{0.1x+2y=6.5

(4)
{0.7x+6y=27.9
{1.5x-2y=-14.5