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Ditanya a?
Dijawab:
f(a)=10
3a+7=10
3a=3
a=1
dit: a = ....?
peny. 10 = 3x + 7
10-7 = 3x
3 = 3x
x = 1
maka f(x)= 3(1) + 7 = 10 atau a=1
maaf klu kurang tepat