math

Consider the sequence of steps to solve the equation:
5(x - 3) = 7x 2
Step 1 ⇒ 10(x - 3) = 7x
Step 2 ⇒ 10x - 30 = 7x
Step 3 ⇒ 3x - 30 = 0
Step 4 ⇒ 3x = 30
Step 5 ⇒ x = 10
Identify the property of equality which yields Step 5.
I'm thinking division

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  1. correct

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    oobleck
  2. The 1st problem is that the solution is not correct
    The 2nd problem is that you seem to be using x as a variable on the left side, and as a multiplication sign on the right.
    or is 7x2 supposed to say 7x^2 ?

    In step #1, you multiplied the left side by 2, but divided the right side by 2

    5(x - 3) = 7x 2
    5x + 15 = 14
    5x = -1
    x = -1/5

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    Reiny
  3. The answer is Division

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  4. Wow do not have to say nothing

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