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2(3x-7)mai mic 10
x ?


Răspuns :

2(3x-7)<10
6x-14<10
6x<10+14
6x<24
x<24
÷6
x<4
daca e in multimea numerelor naturale, x ∈ {0,1,2,3}
2(3x-7)<10 <=> 6x-14<10 <=> 6x<24 <=> x<4 , deci x∈(-∞;4)