10-4(2х+5)=6у-13
4у-63+5(4х-2у)=2
10-8x-20=6y-13
4y-63+20x-10y=2
-8x+3=6y
-6y+20x=65
y=-8/6x+0.5
-6(-8/6+0.5)+20x=65
решаем уравнение:
8-3+20x=65
20x=60
x=3
y=-8/6 * 3+0.5
y=-4+0.5=-3.5
10-4(2х+5)=6у-13
4у-63+5(4х-2у)=2
10-8x-20=6y-13
4y-63+20x-10y=2
-8x+3=6y
-6y+20x=65
y=-8/6x+0.5
-6(-8/6+0.5)+20x=65
решаем уравнение:
-6(-8/6+0.5)+20x=65
8-3+20x=65
20x=60
x=3
y=-8/6 * 3+0.5
y=-4+0.5=-3.5