2a-3b=2 4a - 5c =5 6b-10c=-3

2a-3b=2
jadi 2a = 2 +3b
4a - 5c =5
2(2a) -5c =5
2(2+3b)-5c =5
4+6b+5c = 5
6b+5c = 1
jadi 6b= 1-5c
6b-10c=-3
1-5c-10c =-3
-15c = -4
c = 4/15

6b + 5c = 1
6b + 5(4/15) =1
6b = 1 - 4/3
6b = -1/3
b = -1/3 x 1/6 = -1/18

2a - 3b =2
2a = 2+3b
2a = 2 +3(-1/18)
2a = 2 -3/18
2a = 2 -1/6
2a = 11/6
a = 11/6 x 1/2 = 11/12