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7 November, 15:48

Which equation has the solution x = 9? Select each correct answer.

3x + 2 = 25

24-2x=13

4 + 5x = 18

x3+7=8

2x-3=15

81x-3=6

+2
Answers (2)
  1. 7 November, 16:31
    0
    Plug x = 9 into each equation and see if it fits.

    we see that 2 (9) - 3 = 15 so the fifth choice is the correct one

    2x - 3 = 15
  2. 7 November, 17:56
    0
    Substitute 9 for x in each of the given equations. Which equations are then true? Which are false?

    Example: Subst. 9 for x in 4 + 5x = 18. Is 4 + 5 (9) = 18? No. So 9 is NOT a solution of this particular equation.
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