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3 years ago

3[-x+(2x+1)]=x-1 whay is x?

Mathematics

1 answer:

stiks02 [169]3 years ago

4 0

Answer:

well tbh, x will always just equal 1 unless it's next to another number.

Step-by-step explanation:

so the answer is x= 2 btw idk just in case ig

3 ( - x + 2x + 1) = x -1 ( add 1 and 2x together)

3 ( x + 1 ) = x- 1. ( -x and + 2x are like terms)

get rid of parentheses. 3x + 3 = x - 1

moved variable (x) to the left hand side and change its sign. 3x - x + 3 = -1 / 3x - x = 1 - 3

2x - 1 - 3

2x = - 4

x= -2

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AnnZ [28]

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Step-by-step explanation:

We are given the function:

$f(x) = -2c + cx - x^2$

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$\displaystyle f^{-1} (5) = -1$

And we want to determine the value of c.

Recall that by definition of inverse functions:

$\displaystyle \text{If } f(a) = b, \text{ then } f^{-1}(b) = a$

So, since f⁻¹(5) = -1, then f(-1) = 5.

Substitute:

$f(-1) = 5 = -2c + c(-1) - (-1)^2$

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