Răspunsuri

2014-06-15T14:47:51+03:00
(8 x 9 - 6 x 4 + 81 : 9) x a - (1000 - 125 x 7) =1000: 2
(72-24+9)x a-(1000-875)=500
57x a - 125=500
57x a=500+125
57 x a=625
a=10,9