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Afla factorul necunoscut: (28:7)x a=(10x5+18:3)

Răspuns :

(28:7) x a = (10x5+18:3)
4 x a = 50+6
4 x a = 56
a = 56:4
a = 14
( 28 : 7 ) × a = 56

4 × a = 56

a = 56 : 4

a = 14