For which equations is 8 the solution? Select the four that apply.(4 points)

Responses

x2=16
x over 2 is equal to 16

x−2=10
x minus 2 is equal to 10

3x=24
3 x is equal to 24

x8=1
x over 8 is equal to 1

x+2=10
x plus 2 is equal to 10

2x=4
2 x is equal to 4

x−4=4
x minus 4 is equal to 4

x+6=2
x plus 6 is equal to 2

1 answer

To find which equations have 8 as the solution, we can substitute \(x = 8\) into each equation and see if they hold true.

  1. \(x^2 = 16\)
    \(8^2 = 64 \) (Not true)

  2. \(\frac{x}{2} = 16\)
    \(\frac{8}{2} = 4\) (Not true)

  3. \(x - 2 = 10\)
    \(8 - 2 = 6\) (Not true)

  4. \(\frac{x}{8} = 1\)
    \(\frac{8}{8} = 1\) (True)

  5. \(x + 2 = 10\)
    \(8 + 2 = 10\) (True)

  6. \(2x = 4\)
    \(2 \cdot 8 = 16\) (Not true)

  7. \(x - 4 = 4\)
    \(8 - 4 = 4\) (True)

  8. \(x + 6 = 2\)
    \(8 + 6 = 14\) (Not true)

The equations that have 8 as a solution are:

  • \(\frac{x}{8} = 1\)
  • \(x + 2 = 10\)
  • \(x - 4 = 4\)

Therefore, the correct responses are:

  1. \(x \div 8 = 1\)
  2. \(x + 2 = 10\)
  3. \(x - 4 = 4\)
  4. (None of the options match this, so the selection would end here, unless one option was repeated or another equivalent form was provided.)

The selected three responses are:

  • \(\frac{x}{8} = 1\)
  • \(x + 2 = 10\)
  • \(x - 4 = 4\)

If there was an intention of including one more, it might be the fourth response implying its equivalent form instead of the equations.

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