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= b = -6:2 = -3
b. (-3a + b = -15) - (3a + b = 9) = -6 = -24
= -24 : (-6) = 4
f(x) = 4x + (-3)
c. f(-2) = 4. -2 + (-3)
= -8 + (-3)
= -11
d. f(2) = 4. 2 + (-3)
= 8 + (-3)
= 5
e. f(-2) + f(2) = -11 + 5 = -6