Ask Question
22 July, 19:33

Solve the equations by elimination.

-7x-8y=9

-4x+9y=-22

+2
Answers (1)
  1. 22 July, 19:34
    0
    Solve for x in - 7x - 8y = 9

    x = - 9 + 8y/7

    Substitute x = - 9 + 8y/7 into - 4x + 9y = - 22

    4 (9 + 8y) / 7 + 9y = - 22

    Solve for y in 4 (9 + 8y) / 7 + 9y = - 22

    y = - 2

    Substitute y = - 2 into x = - 9 + 8y/7

    x = 1

    Thus,

    x = 1

    y = - 2
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Solve the equations by elimination. -7x-8y=9 -4x+9y=-22 ...” 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