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Bab FungsiMatematika SMP Kelas VIII
1] f(x) = 2x + 1
f(a) = 11
2a + 1 = 11
2a = 11 - 1
a = 10/2
a = 5
2] f(x) = 7 - 2x
f(a) = 1
7 - 2a = 1
-2a = 1 - 7
a = -6/-2
a = 3