№1) 1)0.25x>1 2)1-6x>=0 3)5y-7-6< 4y-1.5
x>1/0.25 6x=<1 <strong> y<11.5</strong>
x>4 x<=1/6</strong>
№2)
m+1<3m-18</p>
-2m< -19
m> 9.5
№3
А) 
0}} \right." alt="\left \{ {{3x-9<0} \atop {5x+2>0}} \right." align="absmiddle" class="latex-formula"> Б) 
(-2)}} \right." alt="\left \{ {{3x<9} \atop {5x>(-2)}} \right." align="absmiddle" class="latex-formula"> 
1} \atop {x>-0.5}} \right." alt="\left \{ {{x>1} \atop {x>-0.5}} \right." align="absmiddle" class="latex-formula">
(-0.4)}} \right." alt="\left \{ {{x<3} \atop {x>(-0.4)}} \right." align="absmiddle" class="latex-formula">
Ответ: x принадлежит {-0.4 ; 3} Ответ: X больше 1
№4
Б) 
=x}} \right." alt="\left \{ {{5-10x<2x-4} \atop {2.5 +0.5x>=x}} \right." align="absmiddle" class="latex-formula">
=-2.5}} \right." alt="\left \{ {{-12x<-9} \atop {-0.5x>=-2.5}} \right." align="absmiddle" class="latex-formula">
0.75} \atop {x<=5}} \right." alt="\left \{ {{x>0.75} \atop {x<=5}} \right." align="absmiddle" class="latex-formula">
1; 2; 3; 4; 5
+ 
ОДЗ
=0} \atop {a+2>=0}} \right." alt="\left \{ {{12-3a>=0} \atop {a+2>=0}} \right." align="absmiddle" class="latex-formula">
Ответ a∈[-2;4]