SOLUTION: Hi, I have a question about an equation. My equation says solve for p. 3p-7p + 22 = 2 I got an answer of -5 or p = -5. Why is that not right? I checked it over and got the

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Hi, I have a question about an equation. My equation says solve for p. 3p-7p + 22 = 2 I got an answer of -5 or p = -5. Why is that not right? I checked it over and got the       Log On


   

Question 364655: Hi, I have a question about an equation. My equation says solve for p.
3p-7p + 22 = 2
I got an answer of -5 or p = -5. Why is that not right? I checked it over and got the same answer. Can you explain?
Found 2 solutions by Fombitz, ewatrrr:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
3p-7p+%2B+22+=+2
-4p%2B22=2
-4p=-20
highlight%28p=5%29
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.
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You can always check a solution by putting it back into the original equation.
3p-7p%2B22=2
3%28-5%29-7%28-5%29%2B22=2
-15%2B35%2B22=2
20%2B22=2
42=2
So then, p=-5 cannot be the solution since it doesn't lead to a true statement.
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.
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3p-7p%2B22=2
3%285%29-7%285%29%2B22=2
15-35%2B22=2
-20%2B22=2
2=2
True, so p=5 is the correct solution.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi, 

3p-7p + 22 = 2 

-4p = -20

p+=+%28%28-20%29%2F%28-4%29%29+=+%28%28%28-1%29%2A20%29%2F%28%28-1%29%2A4%29%29%29

p = 5