2x-3y=2

1 answer

1. (1) 2x - 3y = 2
   (2) x + 2y = -20
   to solve this by substitution, we choose one of the equations. from there, we choose a variable and represent it in terms of the other variable.
   here, let's choose equation (2), and make variable x in terms of y:
   x + 2y = -20
   x = -20 - 2y
   then we substitute this to equation (1):
   2x - 3y = 2
   2(-20 - 2y) - 3y = 2
   -40 -4y - 3y = 2
   -4y - 3y = 2 + 40
   -7y = 42
   y = -6
   now we substitute this to either equations to get x,, let's substitute this to equation (2):
   x + 2y = -20
   x = -2(-6) - 20
   x = 12 - 20
   x = -8
   
   hope this helps~ :)

   Answer ID
   539047

   Created
   April 29, 2011 6:05am UTC

   Rating
   0

   URL
   https://questions.llc/answers/539047