Ask Question
31 August, 03:27

Albert says these two systems are similar

#1

8x+9y=48 12x+5y=21

#2

8x+9y=48. - 8.5y=-51

Are they similar?

+4
Answers (1)
  1. 31 August, 03:36
    0
    we solve the second system: (itis more easy).

    8x+9y=48

    -8.5y=-51 ⇒y=-51/-8.5=6

    8x+9 (6) = 48

    8x+54=48

    8x+54-54=48-54

    8x=-6

    x=-6/8=-3/4

    Then; in te second system the solution is : x=-3/4; y = 6

    Now, we replace "x" by "-3/4" and "y" by "6", in the first systmen.

    8x+9y=48

    8 (-3/4) + 9 (6) = - 6+54=48. verified

    12x+5y=21

    12 (-3/4) + 5 (6) = - 9+30=21 verified

    Therefore,

    These two wystems are similar.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Albert says these two systems are similar #1 8x+9y=48 12x+5y=21 #2 8x+9y=48. - 8.5y=-51 Are they similar? ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers