{0,2x+15y=9,8. { 0,3x-0,5=0
{0,75-10y=-3. { 0,1x+2y=6,5

{0.2х+15у=9.8{0.75-10у=-3-10у=-3-0.75-10у=-3.75|:(-10)у=0.3750.2х+15у=9.80.2х+15×0.375=9.80.2х=9.8-5.6250.2х=4.175|:0.2х=20.875{0.3х-0.5=0{0.1х+2у=6.50.3х=0.5|:0.3х=1.670.1х+2у=6.52у=6.5-0.1×1.672у=6.5-0.1672у=6.333|:2у=3.1665