Question

3.168.000=5a+10b
7.260.000=10a+30b

Answer 1

 5a  +  10b = 3 168 000 (-2)

10a + 30b = 7 260 000
___________________

- 10a  -  20b = - 6 336 000
  10a +  30b  =  7 260 000
_____________________
10b = 924 000

b = 924 000/10

b = 92 400


5a + 10b = 3 168 000

5a + 10 . 92 400 = 3 168 000 ------ 5a + 920 400 = 3 168 000

5a = 3 168 000 - 924 000 ------- 5a = 2 244 000  ------  a = 2 244 000/5

a = 448 800
 
S = { 448 800; 92 400}