SOLUTION: Solve the equation 3x = 3(3x + 1). Solve the equation 2(2x - 1) = 8(x + 7). Evaluate the expression log12122.

Algebra ->  Equations -> SOLUTION: Solve the equation 3x = 3(3x + 1). Solve the equation 2(2x - 1) = 8(x + 7). Evaluate the expression log12122.      Log On


   

Question 7170: Solve the equation 3x = 3(3x + 1).
Solve the equation 2(2x - 1) = 8(x + 7).
Evaluate the expression log12122.
Answer by prabhjyot(165) About Me  (Show Source):
You can put this solution on YOUR website!
1>3x = 3(3x + 1).
3x = 9x +3
3x -9x =3
-6x =3
x=-1%2F2

2>2(2x - 1) = 8(x + 7)
Solving the parenthesis
4x - 2 = 8x +56
4x - 8x = 56 +2
-4x = 58
x+=-58%2F4
x= -14.5
3>log_12+%2812%29%5E2
Where _12 is thebase of the log
According to log rules log+%28m%5En%29=nlog+m
Solving we get
2 log _12 12