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ex1 2×(x+13)<145

ex2 3×(y+21)<64

Răspuns :

Vladanlucica
1) 2×(x+13)<145
   x+13≤144÷2
   x+13≤72⇒x=72-13=59⇒x<60, adica 59,58,57,...,4,3,2,1.⇒mai multe solutii

2) 3×(y+21)<64
    3×(y+21)≤63
   y+21≤63÷3
   y+21≤21⇒y=21-21=0⇒ problema are o solutie