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Elenamarina809
a fost răspuns

aflati necunoscutul: (3×X+2):4-2=3. ; [(X+3)×3+3]×3+3=102

Răspuns :

Spidie
(3*X+2):4-2=3.
(3*x+2):4=3+2
(3*x+2):4=5
3*x+2=5*4
3*x=20-2
3*x=18
x=6

[(x+3)×3+3]×3+3=102
[(x+3)×3+3]×3=102 -3
[(x+3)×3+3]×3=99
(x+3)×3+3=99:3
(x+3)×3+3=33
(x+3)×3=33-3
(x+3)×3=30
x+3=30:3
x+3=10
x=10-3
x=7

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