Algebra 1

posted by .

3r-5s=-35
2r-5s=-30

multiply equation 2 by -1 then add the two equations. s will cancel and you can solve for r.
Post your work if you need further assistance.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. ks maths

    2x - 4y = 12 3x + 2y = 10 whats the answer Do you know how to solve simultaneous equations?
  2. System of equations

    3x =2y = 17 2x-y =9 and 3x+y = 3 x+2y = -4 How do I do these?
  3. Math Help plz!!! Really need help.

    Use the Systematic Trial to solve this problem. Peanut-Pecan Problem Peanuts sell at $5/kg and pecans sell at $20/kg. Marika wants to make 30kg of a mixture of peanuts and pecans that will s ell at $10/kg/ How many kilograms of peanuts …
  4. algebra

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

    And if a length of a rectangle is 3 more than twice the width and the are is 90 cm squared than what are the dimensions of the rectangle?
  6. maths

    1x+2y=5 3x+7y=18 x= y= Multiply equation 1 by -3, add to equation 2 (which eliminates x), then solve for y. Use that value in the other equation to solve for x. Post your work if you get stuck AND explain in detail what you don't understand.
  7. Algebra

    Find two consecutive positive integers such that the sum of the square is 85..(show your work) If X is the first integer, then X+1 is the next; therefore, the sum of those squares will be 85. X^2 + (X+1)^2 = 85 Solve for X, then add …
  8. math

    I need help solve the equation by fractions 8/(21-y) = 12/(y+19) I think the answer is y = 5, i just need to know how to do work out. i done some solution like this first multiply by(21-y)(y+19)(assuming that y = 21 and y = 19: (21-y)(y+19)8/(21-y) …
  9. Algebra

    To solve the following system of equations by elimination, which step would best to perform first?
  10. math

    What would you need to multiply by in order to solve this system of equations using the linear combination (elimination) method?

More Similar Questions