Question

daca a ) a x b - a x ori c =1440 a= 45 b = 5
b ) b - c = 7 a = 14 si b =21 calculati (b-c)+a ori b multumesc frumos

Answer 1

a) a * b - a * c = 1440
    a = 45    b = 5
45 * 5 - 45 * c = 1440
- 45c = 1440 - 225
c = - 1215 : 45
c = - 27
a * b - a * c = 1440
45 * 5 - 45 * (- 27) = 1440
225 + 1215 = 1440
1440 = 1440
b) b - c = 7
    a = 14  si b = 21
(b - c) + a * b = 7 + 14 * 21 = 7 + 294 = 301