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6 October, 13:58

Solve the system by linear combination. Show all your work.

9x+5y=35

-2x-5y=0

+1
Answers (1)
  1. 6 October, 15:17
    0
    (5, - 2)

    Step-by-step explanation:

    Given the 2 equations

    9x + 5y = 35 → (1)

    - 2x - 5y = 0 → (2)

    Adding the 2 equations term by term will eliminate the y - term

    7x = 35 (divide both sides by 7)

    x = 5

    Substitute x = 5 into either of the 2 equations for value of y

    Substituting in (1) gives

    9 (5) + 5y = 35

    45 + 5y = 35 (subtract 45 from both sides)

    5y = - 10 (divide both sides by 5)

    y = - 2

    Solution is (5, - 2)
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