There are 3 consecutive integers. 4 more than the smaller number plus twice the 3rd number is 7 less than the 2nd number

  -7, -6, -5

Step-by-step explanation:

Let x represent the second number. Then x-1 is the first number, and x+1 is the third number.

  (x-1) +4 +2(x+1) = x -7

  3x +5 = x -7

  2x = -12

  x = -6

The integers are -7, -6, -5.

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: