Bantu jawab gan………..

Berarti :
-1 + 4 = 4c – b
3 = 4c – b

-b – 3 = -8c + 3b
-b = -8c + 3b + 3
-b + 8c – 3b = 3
-4b + 8c = 3

3 + b = -4 + 3a + 3
b + 3 = 3a – 1
b = 3a – 4

eliminasi :
4c – b = 3 | x 2| 8c -2b = 6
-4b + 8c = 3 | x 1| -4b + 8c = 3
————————————- –
2b = 3
b = 3/2
3/2 = 3a – 4
3a = 3/2 + 4
3a = 11/2
a = 11/6