Question

Tolong yang bisa sibstitusikan ini

a+b+c= 6
-b-3c=-7
-a-2b-2c=-1

Answer 1

A = -b-c+6
b = 7-3c
=> a = -(7-3c)+6
a = 3c-1
=> -(3c-1) -2(7-3c) -2c = -1
-3c+6c-2c +1-14 = -1
c = -1 +13
c = 12

=> b = 7-3(12)
b = 7-36
b = -29

=> a = 3(12)-1
a = 36-1
a = 35