Răspunsuri

2014-04-16T12:33:33+03:00
A=4k
b=9k

(4*3k+8*9k)/8*9k=
12k+72k/72k=
84k/72k=
84/72= simplif prin 2
42/36 - simplif prin 2
21/18 - simplif prin 3
7/6

2014-04-16T12:34:46+03:00
A,b  dp cu  4,9  ⇒a/4=b/9=k    a=4k    b=9k

3a+8b/8b=    3*4k  +8*9k/ 8*9k=     12k+72k/72k=    84k/72k=7/6