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Tatiana [17]
3 years ago
7

Given ƒ(x) = −3x + 21, find x when ƒ(x) = 6. A) −2 B) 3 C) 5 D) 7

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
7 0

Answer:

x = 5

Step-by-step explanation:

We have,

f(x) = -3x + 21 .....(1)

It is required to find x when the value of f(x) = 6

Put f(x) = 6 in equation (1) such that we get :

6 = -3x + 21\\\\3x=21-6\\\\3x=15\\\\x=5

The value of x is 5 if f(x) = 6.

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