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Rezolvati in nr nat a) 2·x-126=792 b) 47-3·15>9-x

Răspuns :

a) 2×X -126=792
2x=792+126
2x=918
x=918:2
x=459

b) 47-3×15>9-x
47-45>9-x
2>9-x

x=9, 8

2>9-9 》2>0

2>9-8 》2 >1
a)2*x-120=792
2x=792+120
x=912:3
x=456
P:2*456-120=792=>912-120=729
b)47-3*15>9-x
47-45>9-x
x=9-2
x=7
P:47-3×15>9-x
47-45>9-7
2>9-8