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Busteneastefan
a fost răspuns

inecuatia 243:(x-4)MAI MARE decat 9
b) (2 orix+3orix):5 mai mic sau egal decat8
c)[4ori(13orix+5orix)]:36mai mic sau egal decat 30

Răspuns :

Anamariaangel
243:(x-4)>9
x-4>9*243
x-4>2187
x>2187+4
x>2191

(2x+3x):5≤8
5x:5≤8
x≤8

[4*(13x+5x)]:36≤30
(4*18x)≤30*36
72x≤1080
x≤1080:72
x≤15

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