math

posted by .

this makes no sense to me and won't to my child either. the instructions for solving, are try 3 numbers that add to the total with 2 numbers equal and the other 8 less then revise numbers till you get the answer. the question is: Jan, Mya And Sara ran a total of 64 miles last week. Jan and Mya ran the same number of miles. Sara ran 8 less miles than Jan and Mya. How many miles did Sara run?

  • math -

    Let x be the number of miles run by Jan.
    Let x be the number of miles run by Mya.
    Let x-8 be the number of miles run by Sara.

    * using the following equations, we have:
    x+x+x-8=64
    3x-8=64
    3x=64+8 * since we transposed -8 on the right side, it became +8.
    3x=72 * in order to get the value of x, we divide both side by 3.
    x= 24 miles.

    Jan and Mya ran 24 miles each while Sara, x-8 (24-8), run 16 miles.

    If we add the 3 numbers, 24 mi, 23 mi, and 16 mi, the total will be 64 miles.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    1,6,3,7,9,4,5,7=17 only plus or minus can be out in between the numbers and they must stay in the order shown EX. 1-6+3-7+9-4+5+7=17 It must equal 17 Here's a hint. Add all the numbers up first, then see what number needs to be subtracted …
  2. Math

    The average of 3 numbers is 45. If one of the numbers is 43, what is the average of the other 2 numbers?
  3. Algebra

    What is the length of the interval of solutions to the inequality 1 ( is less than or equal to) 3-4x (is less than or equal to) 9?
  4. Math

    Hot numbers in a lottery are numbers that keep coming up. Cold numbers are numbers that have not "hit" in awhile.Some people select hot numbers or cold numbers when buying a ticket. Using probability,explain whether this makes sense. …
  5. 3 grade math

    I can answer this question, but I need to explain to our child how to solve it using the method requested, not an algebra solution. Child is becoming frustrated and confused while attempting to answer these questions. the instructions …
  6. math

    The least common multiple of two numbers Is 60 , and one of the numbers is 7 less than The other number. What are the numbers
  7. Math

    the lcm of two numbers is 60 and one of the numbers is 7 less than the other number, what are the numbers?
  8. math

    The Least Common Multiple of two numbers is 60, and one of the numbers is 7 less than the other number. What are the numbers?
  9. Math

    The least common multiple of two numbers is 60, and one of the numbers is 7 less than the other number. What are the numbers?
  10. Math

    The least common multille of teo numbers is 60,and one of the numbers is 7 less than the other number.What are the numbers?

More Similar Questions