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-3x + 2y = -12 (kali 3) -9x + 6y = -36
-------------------- +
-x = -6
x = 6
Masukan niali x :
4(6) - 3y = 15
24 - 3y = 15
- 3y = 15 - 24
- 3y = -9
y = -9/-3
y = 3
HP {6,3}
maka :
a + b
= 6 + 3
= 9
Semoga membantu :)