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3(-1) + 10 = a
-3 +10 = a
a = 7
f(b) = -2
3b +10 = -2
3b=-12
b=-4
a+b = 7 + (-4)
= 3
Jawaban A
f(b) = -2
-2 = 3b + 10
-12 = 3b
-4 = b
f (-1) = a
3 (-1) + 10 = a
7 = a
a + b = 7 + (-4) = 3