F(x) = 3x + 5 Work out a if f(a)= -13
2 answers:
Answer:
a = -6
Step-by-step explanation:
see, x has been replaced by a.
so f(a) = 3a + 5 . . . . . . . (i)
a displaces x from it's every position in the equation.
and it's given that f(a) = -13
putting f(a) = -13 in equation (i) :-
3a + 5 = -13
- taking like terms to one side
3a = -18
- dividing the equation by 3
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