504.
5+х>3x-3(4x+5)
5+x>3x-12x-15
x+9x>-15-5
10x>-20
x>-2
506.
5(x+4)<2(4x-5)<br>5x+20<8x-10<br>5x-8x<-10-20<br>-3x<-30<br>x>10
508.
x+2<5x-2(x-3)<br>x+2<5x-2x+6<br>x-3x<6-2<br>-2x<4<br>x>-2
510.
4(x-1)-(9x-5)≥3
4x-4-9x+5≥3
-5x≥3-1
-5x≥2
x≤-0.4
512.
3(x-2)-5(x+3)>27
3x-6-5x-15>27
-2x>27+21
-2x>48
x<-24