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afla termenul necunoscut si fa proba 497+a = 625 ; z-387= 705 ; 841-i = 59

Răspuns :

497+a=625=>a=625-497=128
128+497=625
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z-387=705=>z=387+705=1092
1092-387=705
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841-i=59=>i=841-59=782
59+782=841
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497+a=625/-497. Proba 497+128=625
a=128
z-387=705/+387 Proba 1092-387=705
z=1092
841-i=59. Proba 841-782=59
i=841-59
i=782
Sper ca e de folos