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23 October, 17:06

Solve system by substitutition or elimination.

9x-8x=9

-18x+16y=-18

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Answers (1)
  1. 23 October, 20:24
    0
    1. 9x-8y=9

    2. - 18x+16y = - 18 ⇒ - 9x+8y = - 9 ⇒ 9x-8y=9

    as we see both equations are same, it means the lines overlap and there is infinite number of solutions
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