sovle by substution

posted by .

i don't get this whole concept what-so-ever so lets start with problem one y= -3X +5
5 X - 4y = -3

  • sovle by substution -

    Your first equation tells a value for Y. Substitute that in the second equation.

    5x - 4(-3x + 5) = -3
    5x + 12x - 20 = -3
    17x = 20 - 3
    17x = 17
    x = 1

    Now substitute 1 for x in the first equation to find a value for y.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. english

    can somebody please help me with this question . Is this statement logical?
  2. trigonometry

    i have posted this question up alot of times before but i guess no one gets it because no one ever replies.. find the latitude of Spokane, WA if Spokane and Jordan Valley, OR, 43.15degN, are 486 km apart. (assuming that the cities …
  3. 6th grade

    how do you solve a problem when you have one whole # with a whole # and fraction. this is subtracting ex: 16 -10 2/7 ________________
  4. sovle by substution

    how do you do equations where they don't give you y to start like -4x +y =6 -5x - y=21
  5. algebra 1

    clear definition of important terms for substution and and example problem?
  6. Math

    When they dial 3 and turn the oven on, it is like pushing the old button 3 times. That means if they start with one pizza in the oven, dial 3, and turn the oven on, they will get 27 pizzas. (33 = 27) Then if they dial -3 and turn the …
  7. Math

    lets start over with this problem: n^2 - 9n + 9 how do you determine if this is a perfect square, and can you factor it?
  8. Chem Help Please!

    Separation / Chromatography Lets assume I have three component mixture of liquids. And I wish to determine the quantity of each component present. I have reference samples of two of the components but the other component is not identified. …
  9. Chem Help Please!

    Separation / Chromatography Lets assume I have three component mixture of liquids. And I wish to determine the quantity of each component present. I have reference samples of two of the components but the other component is not identified. …
  10. Math

    which value is the "whole" in the following problem: 14 is what percent of 56?

More Similar Questions