Math help

I have a question. How would you solve a system if the variable and number is in front of the equals sign for example : y=3
4y=2x+18

I need help can someone guide me on this?

  1. 👍 0
  2. 👎 0
  3. 👁 85
  1. Well,you are told that y has a value of 3
    so in the 2nd equation, simply replace y with that value and solve for x

    4(3) = 2x + 18
    12 - 18 = 2x
    -6 = 2x
    -3 = x

    so x=-3, y = 3
    Done!

    1. 👍 0
    2. 👎 0
    posted by Reiny
  2. 4y=2x+18

    12 = 2x + 18

    -6 = 2x

    -3 - x

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra22222!!!

    Choose the ordered pair that is a solution to the system of equations. 3x - y = 10 -x + y = -4 (3, -7) (-1, 3) (3, -1) (3, 1) Follow the example I gave in your previous question. I'm not going to do all of them. You want to

    asked by Margie on October 14, 2006
  2. math

    Eight subtracted from six times a number is -134. What is the number? A) Translate the statement above into an equation that you can solve to answer this question. Do not solve it yet. Use x as your variable. solve for x

    asked by kelly on February 21, 2013
  3. Algebra

    There are 4 problems that I don't understand how to solve so, please help me. A numerical explanation with words explanation would be nice. Thank you tutors. Rewrite each equation so it is in the form ax + b = c or x + d/e = f,

    asked by anon on December 9, 2015
  4. Algebra

    Solve the system -3x+4y=-6 5x-3y=-22 3y+2z=-1 I'm not sure how to approach this question because all of the equations are missing a variable??

    asked by Max on November 13, 2010
  5. Advanced Algebra

    Solve the system -3x+4y=-6 5x-3y=-22 3y+2z=-1 I'm not sure how to approach this question because all of the equations are missing a variable??

    asked by Carry on November 13, 2010
  6. Algebra 1--Please, help me!

    4. The sum of the digits of a two-digit number is 11. If 45 is added to the number, the digits will be reversed. a. Write a system of equations that you can use to find the digits of the number. Tell what each variable represents.

    asked by Victoria on June 10, 2014
  7. Algebra

    Find the number of the solutions to each system. a. 4x-y+1=0 4x-y+3=0 b. 2x-y+4=0 4x-2y+8=0 Write a question that can be solved using a system of linear equations. Solve the following system of equations by graphing: y=x+3 and

    asked by LadyPhantomhive on January 13, 2016
  8. algebra 2

    1. 5x+2>3x+10 =x>4 2. 8+2x< or equal too 6x-20 x> or equal too 7 3. 4(1-3n)-14>4(2n+3)-9n =? 4-12n-14>8n+12-9n 5. x/4-9 -p>-63 p or equal too 6 -t> or equal to 72 t< or equal too 72 9. -y36 10. define a variable, write an

    asked by anonymous on September 22, 2014
  9. math

    Please explain in detail how to solve each question: At a certain high school, 350 students are taking an algebra course. The ratio of boys to girls taking algebra is 33:37. How many more girls are taking algebra than boys? How

    asked by Jane on January 4, 2012
  10. math (college algebra)

    Ok I have two questions I have NO CLUE how to complete on my homework. Please help ASAP! (1) Solve the formula for the specified variable r = vx for r (the question is) v = ? a = 1/3f * p for f (the question is) f = ? (2) Solve

    asked by Sam on September 2, 2010

More Similar Questions