{(x-10)/8-(2y-5)/5=0|*40
{(8y+1,5)/5-1/10=3(x-4)/4-2,3
{5x-50-16y+40=0
{(8y+1,5)/5-1/10=(3x-12)/4-2,3|*20
{5x-16y=10
{32y+6-2=15x-60-46
{5x-16y=10|*2
{-15x+32y=-110
+{10x-32y=20
+{-15x+32y=-110
-5x=-90|:(-5)
x=18
18*5-16y=10
-16y=-80|:(-16)
y=5
#2
{x+2-(5x+3y)/7=(5y-11)/14*14
{y+2-(4y-3x)/2=(5x-2y+5)/5|*10
{14x+28-10x-6y=5y-11
{10y+20-20y+15x=10x-4y+10
{4x-11y=-39|*5
{5x-6y=-10|*4
-{20x-55y=-195
-{20x-24y=-40
-31y=-155|:(-31)
y=5
5x-6*5=-10
5x=-10+30
5x=20|:5
x=4