Recent Comments

1. about 15 years ago on FoxTrot

   Another way to solve it

   2x + y = 60 –given

   y = 60 - 2x –solve for y

   x + 2y = 75 –given

   x + 2(60 - 2x) = 75 –replace y with 60-2x

   x + 120 - 4x = 75 –distribute 2

   120 - 3x = 75 –simplify

   120 = 3x + 75 –add 3x to both sides

   120 - 75 = 3x –subtract 75 from both sidex

   45 = 3x –simplify

   x = 15 –divide both sides by 3

   2x + y = 60 –given

   2(15) + y = 60 –replace x with 15

   30 + y = 60 –multiply

   y = 60 - 30 –subtract 30 from both sides

   y = 30 –simplify