SOLUTION: Can somebody help me please? 7. If P = 3y + 7xy - 2x and Q = 9 - 2y, find the value of 3P - 4Q

Algebra ->  Algebra  -> Expressions -> SOLUTION: Can somebody help me please? 7. If P = 3y + 7xy - 2x and Q = 9 - 2y, find the value of 3P - 4Q      Log On

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

Question 151658This question is from textbook elementary and intermediate algebra concepts and applications
: Can somebody help me please?
7. If P = 3y + 7xy - 2x and Q = 9 - 2y, find the value of 3P - 4QThis question is from textbook elementary and intermediate algebra concepts and applications

Answer by jim_thompson5910(28510) About Me  (Show Source):
You can put this solution on YOUR website!
3P+-+4Q Start with the given expression.


3%283y+%2B+7xy+-+2x%29+-+4%289+-+2y%29 Plug in P = 3y + 7xy - 2x. Plug in Q = 9 - 2y


9y+%2B+21xy+-+6x+-+36+%2B8y Distribute


-6x+%2B+21xy%2B17y+-+36 Combine like terms.


So 3P+-+4Q=-6x+%2B+21xy%2B17y+-+36