Question

Determina ne nat necunoscut x, din fiecare inegalitate de mai jos :
a)19+x >43
b)28-x.11
c) x+38-18 < 83
d)41+x-39<83-77

Answer 1

a)19+x.>43
x>43-19
x>24
b)28-x>11
x>28-11
x>17
c)x+38-18<83
x<83-38+18
x<63
d)41+x-39<83-77
x<6-2
x<4

Answer 2

a)x>43-19
   x>24
  x={25,26,27,28,29..n....}
 b)x<28-11
   x<17
  x={0,1,2,3,4,....15,16}
c)x+20<83
   x<83-20
   x<63
   x={0,1,2,3,4....62,63}
d)41+x-39<6
   x-39<41-6
   x-39<35
   x<39-35
   x<34
  x={0,1,2,3,4.....32,33}