very basic algebra

posted by .

I was told long ago way back when
that when you have something like this

-x = 7

you solve for x by doing the following

(-x = 7)-

x = -7

but now that I think about it
your not actually multiplying by negative one what is actually happening is this right???

(- x = 7)-^-1

to get the negative ones to cancel out to give you this

x = -^-1 7

or simplified as x = - 7

so my question is does the negative in the denomenator matter??? can you always just move it up or take the opposite of the whole thing even with somehting like this

- x = (7x + 5x^2 - 3)^-1 (6x + 7x^2 -2)
do you sovle this the same way

(- x = (7x + 5x^2 - 3)^-1 (6x + 7x^2 -2))-^-1

x = (-(7x + 5x^2 - 3))^-1 (6x + 7x^2 -2)

is that correct???

  • very basic algebra -

    my teachers use to tell me that you could just multiply by negative one because it dosen't change its value but that is not true as it changes its direction

  • very basic algebra -

    Your teachers are right. I do not comprehend your thinking. You are obfuscating a very simple operation, multiplying each side by -1

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. basic math

    say i have something like (2/3)-(1/3) ---------------- 3 do i multiply the top this way (1/3)(3/1) by flipping the denominator or multiply it like this (1/3)(1/3)
  2. Physics

    so I'm doing the back of this worksheet and on the bottom there's a list of a whole bunch of formulas... I'm asked to find the minimum coefficent of friction if the road was flat of a car which I still don't know how to do and posted …
  3. Calculus

    I'm doing graphs/domain/range of basic functions. I have three questions: How do I find the domain and range of a function?
  4. English

    I have a question about quoting. If I have a sentence like: Something something something something "something". Do I quote it this way?
  5. Compliments

    Hey, Im trying to find lots of compliments. For example, if someone makes a really nice drawing or whatever, and enhances it with their own techniques and stuff, what comments could I give to them?
  6. physics

    hi im trying to do a problem that involves multiple battereis, one capacitor,and multiple resistors, and im told that the circuit has been connected for a very long time... i found the current passing through each battery using kirchoffs …
  7. English and Grammar

    I choose to do research on Avoidant personality disorder or APD because a friend of is suffering from APD and I’m having trouble how to approach him. My friend’s name is Jim. He told me that he started to feel the symptoms when …
  8. English/Poetry

    Hi! So, I'm learning about Iambic Pentameter in class and i'm very confused. I'm supposed to pick a song and figure out the pentameter. However, I'm not sure if the song I chose, American Pie by Don Mclean, even has one. Like when …
  9. Algebra, Solving inequalities

    1. 5h - 9 = -16 + 6h 4 7 -7 10*** 2. 4x + 4 = 9x - 13 -8 -7 8 -3 3. Which of the following equations has an infinite number of solutions?
  10. English

    They watch science programs in their spare time! Instructions: Select the correct answer. My answers are with capital letter 1. Jason wanted to pass on ... A. something who he had been told. B. SOMETHING, WHICH HE HAD BEEN TOLD. C. …

More Similar Questions