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= 4 + 3
= 7
f(3) = -2(3) + 3
= -6 + 3
= -3
b. f(a) = -2a + 3
-7 = -2 a + 3
2a = 3 + 7
a = 10/2
a = 5
jangan lupa terima kasih....!!!
f(3) = -2 (3) + 3 = -3
b. f(a) = -2 (a) + 3 = -7
-2a + 3 = -7
-2a = -10
a = 5