Question

Determinati necunoscutele astfel inegalitatile sa fie adevarate 4Xa<72, aX9<54 ,a:6<9 ,a:8<30 ,2Xa < 100 a:3<15 clasa 4

Answer 1

4a<72
a<72:4
a<18
a={0...16,17}

9a<54
a<54:9
a<6
a={0,1,2,3,4,5}

a:6<9
a<9*6
a<54
a={0,...51,52,53}

a:8<40
a<40:8
a<5
a={0...3,4}

2a<100
a<50
a={0...48,49}

a:3<15
a<15*3
a<45
a={0..43,44}