Find \( x \) if \( f(x) = 2x + 7 \) and \( f(x) = -1 \).

f(x) = 2x+7
-1 = 2x+7 -7 -7
-8 = 2x
-8/2 = 2x/2
-4 = x
x = -4

Answered by Y4nkeef4n27 | 2024-06-10

Answer: The required value of x is -4.
**Step-by-step explanation: **We are given to find the value of x if :
f ( x ) = 2 x + 7 ( i ) f ( x ) = − 1 ( ii )
Since both the equations (i) and (ii) are the values of x, so comparing the equations, we get
2 x + 7 = − 1 ⇒ 2 x = − 1 − 7 ⇒ 2 x = − 8 ⇒ x = − 2 8 ​ ⇒ x = − 4.
Thus, the required value of x is -4.

Answered by ColinJacobus | 2024-06-12

The value of x is − 4 when solving the equation 2 x + 7 = − 1 . By isolating x , we determined that it equals − 4 .
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Answered by ColinJacobus | 2024-12-20