3,8-1,5y+(4,5y-0,8)=2,4y+3
3,8-1,5y+4,5y-0,8=2,4y+3
-1,5y+4,5y-2,4y =-3,8+0,8+3
0,6у=0
у=0
p = m/n,
m = 30 - 5 = 25,
n = 30,
p = 25/30 = 5*5/(5*6) = 5/6.
A)D=169-4*3*(-10)=289
x1=(-13-17):6=-5 x2=(-13+17):6=1/3
v)x=7/4
g)D=4-4*(-35)=144
x1=(2-12):2=-5 x2=(2+12):2=7