Răspunsuri

2014-10-16T17:34:34+03:00
A= numatul
(a+4)/7=(a-9)/6
6(a+4)=7(a-9)
6a+24=7a-63
6a-7a=-63-24
-a=-87
a=87
2014-10-16T17:45:27+03:00
A= numarul

(a+4)/7=(a-9)/6
6(a+4)=7(a-9)
6a+24=7a-63
6a-7a=-63-24
-a=-87 
a=87
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