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2014-11-17T20:42:41+02:00
a)7·x-3≤5·x+13
7x-5x≤13+3
21x-5x≤13
16x≤16
x≤16/16
x≤1
x=0,1

b)2·x+4<x+16
2x-x<16-4
x<12
x∈{0,1,2,3,4,5,6,7,8,9,10,11}

..la a) am scris gresit..era )7·x-3≤5·x+13
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