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Cat e x?????? 213:11=x+7

Răspuns :

213:11=19
19=x+7 sau invers x+7=19
⇒ x=19-7
⇒x=12

[tex]213:11=x+7\\ \frac{213}{11}=x+7\\ x= \frac{213}{11}-7 \\ x= \frac{213-77}{11} \\ x=\frac{136}{11}\\ x=12 \frac{4}{11} [/tex]