math

posted by .

100- 4 Px + Py +40 = 0
100- 4 Py + Px +40 = 0
Solve the above two equations to get Py = Px = 140/3.

How would you solve the two eq above??

  • math -

    Note that the two equations are not identical.

    Rearrange the equations:
    100- 4 Px + Py +40 = 0...(1)
    100- 4 Py + Px +40 = 0...(2)

    4Px-Py=140...(1a)
    Px-4Py=-140...(1b)

    Solve equations by elimination to get Px=Py=140/3

    4*(1a)-(1b):
    15Px=700, or Px=140/3

    Similarly:
    (1a)-4(1b):
    -3Py=-420, or Py=140/3

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    I just don't understand this question: h(t)=A*b^x h(3)=4 h(5)=40 Solve for b Would you plug 3 into the x and set it equal to 4?
  2. Algebra111111!!!

    Choose the ordered pair that is a solution to the system of equations. -x + y = 12 x + 2y = 3 a. (7, 5) b. (5, -7) c. (-7, 5) d. (-7, -5) e. none of the above This question wants you to find the point of intersection of the two lines, …
  3. algebra 1

    I'm stuck on this problem. Can you help? -4x-9y=1 -x + 2y =-4 WHat is x and y?
  4. algebra

    how would i find an equation of a line that goes through points(1,6) and (3,10)?
  5. Math

    How do I write the Symmetric Equation of a line given the following parametric equations: (where t is a scalar) x=0t y=0t z=1+1t I know normally I would solve each equation for t and set the equations equal to one another. However, …
  6. Math

    Please help! x-2y+z=7 2x+y-z=0 3x+2y-2z=-2 a. Solve the above system of equations using Gaussian Elimination or Gauss-Jordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule.
  7. Mathematics

    3x - 21 = 2y 3y = 84 - 6x Using the two equations above, solve for y. A.11 B.35 C.-6 D.6
  8. 6th grade math

    Hi.. i'm a little confused on using proprtion equations to solve percent problem. can you check the following?
  9. Math Need Help

    The price of an item changed form $140 to $100. Then later the price increase again from $100 to $140. Which of the two changes was larger in percentage in term and how much percent?
  10. math

    A farmer with 1200 acre is considering planting 3 different crops corn, soybeans, and oats. The farmer wants to use all 1200 acres. seed corn costs $20 per acre, while soybeans and oats costs $50 and $12 respectively. The farmer has …

More Similar Questions