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Determinati numarul x, stiind ca a - b = 6 si :

Determinati Numarul X Stiind Ca A B 6 Si class=

Răspuns :

Dianageorgiana794

Răspuns:

x+3a-3b=20

x+3a-3b=20=>x+3·(a-b)=20

x+3·6=20=>x+18=20=>x=20-18=>x=2

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7a-7b+x=55

7(a-b)+x=55=>7·6+x=55=>x=55-42=>x=13

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xa-xb+9a-9b=654

x(a-b)+9(a-b)=654

6x+9·6=654

6x=654-54=>x=600:6=>x=100

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13+x-(5a-5b)=2011

13+x-5(a-b)=2011

13+x-5·6=2011

x=2011-13+30=>x=2028

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