Реши неравенства х+439<444 45-у>69 35*z<100

Question

Реши неравенства х+439<444 45-у>69 35*z<100

Answer 1

х+439<444</strong>
x<444-439<br>x<5<br>(-∞;5)
45-y>69
-y>69-45
-y>24
y<-24<br>(-∞;-24)
35*z<100</strong>
z<100:35<br>z<100/35<br>z<20/7<br>z<2 6/7<br>(-∞; 2 6/7)

Comments

в третьем 100 сократили на 2, а 35 на 5 ;))

Answer 2

X+439<444<br>x<444-439<br>x<5<br>
x∈(-∞;5)

45-y>69
-y>69-45
-y>24 |*(-1)
y<-24<br>
y∈(-∞;-24)

35z<100<br>z<<img src="https://tex.z-dn.net/?f=+%5Cfrac%7B100%7D%7B35%7D+" id="TexFormula1" title=" \frac{100}{35} " alt=" \frac{100}{35} " align="absmiddle" class="latex-formula">
z<<img src="https://tex.z-dn.net/?f=2+%5Cfrac%7B6%7D%7B7%7D+" id="TexFormula2" title="2 \frac{6}{7} " alt="2 \frac{6}{7} " align="absmiddle" class="latex-formula">

z∈(-∞;)