anonymous
  • anonymous
What is the solution to the equation 1 over 21 multiplied by x is equal to 1 over 7? x = 3 x = 14 x = 28 x = 147
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@justwaiting
anonymous
  • anonymous
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mathstudent55
  • mathstudent55
You want to know what x is equal to. That means you want x alone on the left side equaling some number on the right side. Since 1/21 is multiplying x, you need to multiply the left side by the reciprocal of 1/21. The reciprocal of 1/21 is 21. In an equation, you must do the same operation to both sides, so multiply both sides by 21.

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mathstudent55
  • mathstudent55
|dw:1437721446694:dw|
anonymous
  • anonymous
what is the other side
mathstudent55
  • mathstudent55
The reason you multiply 1/21 by its reciprocal, 21, is that a number multiplied by its reciprocal equals 1. That means 21 * 1/21 * x = x The left side is just x now. What is 21 * 1/7 = ?
mathstudent55
  • mathstudent55
|dw:1437721548633:dw|
mathstudent55
  • mathstudent55
What is 21 divided by 7?
anonymous
  • anonymous
x=3
mathstudent55
  • mathstudent55
Correct.
anonymous
  • anonymous
yaaaay

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