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Aflati valoarea luí x: 487+x-510+1780=1800

Răspuns :

Răspuns:

487+x+1270=1800/ - 1270

487+x=530/-487

x=43.

Răspuns:

487+x-510+1780=1800

487+x-510=1800-1780

487+x=20+510

x=530-487

x=43