1) <span>x+y-3>z+5</span>
<span> х-3>z-y+5; y-z-3>5-x; x+y=z+8; x-8>z-y</span>
<span>2) <span> a+1-c<p-q-6</span></span>
<span><span> a) a-c-p+q<-6-1</span></span>
<span> a-c-p+q<-7</span>
<span> б) a+1+q+6<p+c</span>
<span> a+q+7<p+c</span>
18b-9=179
18b=179+9
18b=178 /:18
b=9,8889
408х-37944=2856
408х=2856+37944
408х=40800
х=100
4+а-14/2=30
4+а-7=30
а=30-4+7
а=33
4 11/45 + (3 14/15 + 5 2/45) = 4 11/45 + 5 2/45 + 3 + 14/15 = 12 13/45 + 42/45 =
= 12 55/45 = 13 10/45 = 13 2/9