1-4y = x , 1-4y = 2-2y, 1-2y = 2, -2y = 1 , y = -0.5
2-y = x+y, 2= x+2y, x = 2-2y , 2+0.5 = x -0.5, 2.5 = x -0.5, x=3
y=-0.5
x = 3
Проверка. 1-4(-0.5) = 3, 1+2 = 3, 2+0.5 = 3-0.5, 2.5 = 2.5
Х² + 12х = 0
х(х+12)=0
х=0 х+12=0
х=-12
1) 3*35=105 км
2) 120-105=15 км
= 1-2с^0.5+c^0.5*2 +2c^05=1+c^1=1+c
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