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MariettaO [177]
3 years ago
8

Find the value of x so that the function has the given value. f(x) = 6x+9; f(x)=21

Mathematics
2 answers:
VashaNatasha [74]3 years ago
8 0

Answer: =135

Step-by-step explanation:

f(x) = 6(21)+9

f(x)= 135

hammer [34]3 years ago
3 0

Answer:

x=2

Step-by-step explanation:

Our answer is 2, this is how we know.

First, we work backward:

21-9=12

12 ÷ 6=2

Now we check our answer:

<em>we need to substitute 2 into x:</em>

f(x)=6(2)+9

<em>then we solve:</em>

f(x)= 12+9

f(x)=21

Therefore,

x=2

Brainliest is appreciated!

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