Question

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

Answer 1

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

Answer 2

x+439<444
x<444-439
x<5

x∈(-∞;5)

45-y>69
-y>69-45
-y>24 |*(-1)
y<-24

y∈(-∞;-24)

35z<100
z<$\frac{100}{35}$
z<$2 \frac{6}{7}$

z∈(-∞;$2 \frac{6}{7}$)