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Afla nr necunoscute.

A) 9315+x= 10987

X+389=9781


B) x-3197=5142

X-8917=14320


Răspuns :

a) x=10987-9315
x=1672

x=9781-389
x=9392

b) x=5142+3197
x=8339

x=14320+8917
x=23237
A)x=10987-9315. B) x=5142+3197
x= 1 572. x=. 8339


X=9781-389
X=. 5 392. X=14320+8817
X= 23137