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a fost răspuns

Daca a-5b=7 arunci aflatix din relatiile:


a. x-123+5a-25b=137
b.x-2a+10b+17=14
c.47-x+7a-35b=2a-10b+4

Răspuns :

Renatemambouko
a. x-123+5a-25b=137
x+5(a-5b)=137+123
x+5*7=260
x=260-35
x=225


b.x-2a+10b+17=14
x-2(a-5b)=14-17
x-2*7=-3
x=-3+14
x=11


c.47-x+7a-35b=2a-10b+4 .
-x+7a-35b-2a+10b=+4-47
-x+5a-25b=-43
x-5(a-5b)=43
x-5*7=43
x=43+35
x=78

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