lily2857 lily2857
  • 13-02-2020
  • Mathematics
contestada

_6. ifx-12 = -15, find the value of 4-X

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itmye84 itmye84
  • 13-02-2020

First find the value of "x", by isolating/getting the variable "x" by itself in the equation:

x - 12 = -15   Add 12 on both sides to get "x" by itself in the equation

x - 12 + 12 = -15 + 12

x = -3    

Now that you found the value of x, you can use it to find the value of 4 - x

4 - x        Substitute/Plug in -3 for "x"

4 - (-3)    [two negative signs cancel each other out and become positive]

4 + 3

7         The value of 4 - x is 7

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