Math equation - quite simple?

👨🏻‍🏫 學術台數學

[匿名]

2009-05-17 12:01 pm

If i have the equation:

-y = -7 - x

Does the negative sign on both sides of the equation cancel out? Therefor making the equation like this:

y = 7 + x

Thanks for your help.

更新1:

ok thanks.. i thought i was loosing my mind or something.. i just have this really hard equation and that one part was bugging me coz i cant fault anything else.. oh well.. ill try again..

回答 (12)

[匿名]

2009-05-20 12:16 am

✔ 最佳答案

Yes!

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[匿名]

2009-05-17 12:05 pm

Hi,

Yes, you are right!

It is the same as multiplying (-1) throughout the whole equation. So,

(-1) * (-y) = (-1) * (-7 - x)

which results in

y = 7 + x

Hope this helps!
J

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[匿名]

2009-05-17 12:16 pm

Yes, it is absolutely right.

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[匿名]

2009-05-17 12:09 pm

Yes you are right.

-y = -7 -x
-(y) = -(7+x)
y = 7+x

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nozar nazari

2009-05-17 12:07 pm

Yes.

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[匿名]

2009-05-17 12:05 pm

yup

if you have a negative value , you can multiply EVERYTHING by -1 to simplify it

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An ESL Learner

2009-05-17 12:04 pm

-y = -7 - x
-(y) = -(7 + x)
y = 7 + x

Your answer is correct.

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[匿名]

2009-05-17 12:04 pm

yes

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[匿名]

2009-05-17 12:03 pm

Yes, that's right :)

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[匿名]

2016-10-05 2:42 pm

4(3 - 2x) = 7x-4(a million+x) 12-8x=7x-4-4x 12-8x=3x-4 -8x-3x=-4-12 -11x=-sixteen x=-sixteen/-11 x=sixteen/11 5-(8x-a million) = 6(a million-x)+2 5-8x-a million=6-6x+2 4-8x=8-6x -8x-6x=8-4 -14x=4 x=4/-14 x= wait... no... what...

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