Х^2-4х=х^2+6х+9
х^2-х^2-4х-6х=9
-10х=9
х=-0,9
<span>(635+267)-138(183+467)-267(335+165)-400=902-138*650-267*500-400=902-89700-133500-400=-222700</span>
48/(16+8)*4=48/24*4=2*4=8
12+60/(6*2)=12+60/12=12+5=17
12+60/6*2=12+10*2=12+20=32
4/5 = 12/15
2/3 = 10/15
12/15 > 10/15 => 4/5 >2/3
____________________
2/3 =4/6
4/5 >4/6 => 4/5>2/3
2/5 =4/10
4/10 >3/10 => 2/5 >3/10
______________________
2,5= 0,4
3/10 =0,3
0,4 > 0,3