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afla numarul necunoscut a)×+542=600 B) × minus 243 = 389 c)152 +×=321

Răspuns :

a) x=58
b)x=632
c)x=169
x+542=600
x=600-542
x=58

x-243=389
x=389+243
x=632

152+x=321
x=321-152
x=169