SOLUTION: Solve the following equations. three fourths x MINUS two fifths x = 2 7/x MINUS 1/x-3 = 9/x squared - 3x

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Solve the following equations. three fourths x MINUS two fifths x = 2 7/x MINUS 1/x-3 = 9/x squared - 3x      Log On


   

Question 117227: Solve the following equations.


three fourths x MINUS two fifths x = 2

7/x MINUS 1/x-3 = 9/x squared - 3x
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
3/4X-2/5X=2
3X/4-2X/5=2 COMBINE THESE FRACTIONS BY FINDING A COMMON DENOMINATOR.
4*5=20 LOOKS LIKE A COMMON DENOMINATOR.
[5(3X)-4(2X)]/20=2
(15X-8X)/20=2
7X/20=2 NOW CROSS MULTIPLY.
7X=40
X=40/7 ANSWER.
3/4*40/7-2/5*40/7=2
120/28-80/35=2
(120*35-80*28)/980=2
(4200-2240)/980=2
1960/980=2
2=2