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(-2x-7)x(-3)
14x(-3)
-42
2.-18:3
-6
misal x = -2x - 7x - 3 = -9x - 3
jadi x= 1/3
misal kali = -2 . (-7) . (-3)
= 14 . (-3)
= -42
2. -18 : 3
= -(18) : 3
= -6
Nb : + dikali - = - (dan sebaliknya)
- dikali - = +