Ask a New Question

Question

I have a problem that reads as:
-4x-2y=12
4x+8y=-24
And when solved the answer is (2,-2), but I checked the answer in the back and it says (6,-6)
How does that WORK??
10 years ago

Answers

Steve
if you add the two equations, the x's cancel out, and you have

6y = -12
y = -2
so, x=2.

The book answer is wrong.

(6,-6) fits the 2nd equation, but not the 1st.

If the 1st equation were -4x-2y = -12
then (6,-6) would be correct.

So, it appears that the problem has a typo.
10 years ago

Related Questions

the problem reads: Write the equation of the line which passes through the point (2,1) and is pa... the problem reads: evaluate sqrt (-4) if possible. my answer: sqrt (-4)<0 therefore... the problem reads out like this -3/5m= -45 there trying to find m... Hi the problem reads.......give an example that shows how to use.the distributive property to multi... Problem reads: y^a multiplied by y^a+2 Charlie reads quickly. He reads 1 3/7 pages every 2/3 minutes. How many pages does he read per mi... 1 does not mean he reads the same newspaper every day! It means he reads each day's newspaper.... the problem reads this "A person with mass m1 = 62 kg stands at the left end of a uniform beam with... When someone reads a novel and writes a review with opinions about the work, this is a type of _____... When someone reads a novel and writes a review with opinions about the work, this is a type of __...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use