2 · 2 · 2 + 2 : 2 = 8 + 1 = 9
x+y+z=90
10x=15y=5z
2x=3y=z
x+x*2/3+2x=90
x*(3+2+6)=270
x=270/11=24 6/11
y=180/11=16 4/11
z=540/11=49 1/11
1,496/(2,8x-13,6)=0,1