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afla numarul necunoscut. (78-×)+34=2030-45

Răspuns :

MRantrebare
(78-X)+34=2030-45
(78-X)+34=1985
78-X=1985-34
78-X=1951
X=78-1951
X=  -1873
      S={-1873}
(78-x)+34=2030-45 (78-x)+34=1985 78-x=1985-34 78-x=1951 x=1951-78=1873 x=1873

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