math

posted by .

x+5y= -3
3x-2y= 8
sovle using substituion

  • math -

    (1) x + 5y = -3
    (2) 3x - 2y = 8
    substitution method: we first choose one of the equation, and express one of the variables in terms of the other variable,, here let's choose equation (1), and express x in terms of y:
    x + 5y = -3
    x = -3 - 5y
    now, we substitute this to equation (2), and we solve for y:
    3x - 2y = 8
    3(-3 - 5y) - 2y = 8
    -9 - 15y -2y = 8
    -17y = 17
    y = -1
    substituting this back to either equations to get x (let's choose (1)):
    x = -3 - 5y
    x = -3 -5(-1)
    x = -3 + 5
    x = 2

    hope this helps~ :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    sovle the linear equation -8.3=x+6.1 Thank you
  2. Math

    Can someone help me solve the following problems using the substituion method?
  3. math

    how do i sovle this equation. x/5 = 12/15
  4. Algebra

    1,Sovle using the substitution method. Show your work. If the system has no solution or an infinite number of solutions,state this. -x - 3y = -20 5x + 3y =40 2 Sovle using the elimination method. Show your work. If the system has no …
  5. Algebra

    Sovle using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this -2x + 3y = -37.5 -4x + 0y = -24
  6. Math Help

    Sovle w^2-13w+42=0 I get -6,-7 is this correct?
  7. math

    sovle the following equation 8/x-1=9/(x)(x+2) i know the answer is -1,7 but how?
  8. math (algerba 1)

    how would you sovle this? multiply: (a + 5) (a - 5)
  9. Algebra

    What is the answer to 7x+2y=16 and -21x-6y=24 using the substituion method?
  10. Substituion MATH

    1) -x+10y=60 -4x+16y=32 2) -1/2x - 1/4y=3 1/3x+1/6y=2

More Similar Questions