Question

[(3xX+4)x2+5]x3+5=170 Va rog !!

Answer 1

[(3×X+4)×2+5]×3+5=170-5
[(3×X+4)x2+5]×3=165
(3×X+4)×2+5=165:3
(3xX+4)x2+5=55
(3×X+4)×2=55-5
(3×X+4)×2=50
3×X+4=50:2
3×X+4=25
3×X=25-4
3×X=21
X=21:3
X=7
Verificare: [(3×7+4)×2+5]×3+5=[(21+4)×2+5]×2+5]×3+5
=[25×2+5]×3+5
=[50+5]×3+5
=55×3+5
=165+5
=170 Adevarat
Raspunsul este : 7