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= 9 + 6
= 15
f(2) = -3(2) + 6
= -6 + 6
= 0
b. f (a) = -3a + 6
-9 = -3a + 6
0 = -3a + 6 + 9
3a = 15
a = 15/3
a = 5
*f(-3) = -3(-3) + 6
= 9 + 6
= 15
*f(2) = -3(2) + 6
= -6 + 6
= 0
b)
f(a) = -9
-3a + 6 = -9
-3a = -15
a = 5