How do you begin isolating the variable x to one side of the equation

Multiply both sides by 3x + 7

Step-by-step explanation:

The reason you must multiply first is because you generally want to stay away from binomial division, as it is much easier to work without fractions. Once you multiply both sides by 3x + 7, you effectively only have to work with numerators now, instead of both numerators and denominators. After you have shifted by multiplying both sides by 3x + 7, you can isolate x by adding and subtracting from both sides, but you generally what to stay away from dividing variables.

Hope this helps!

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: