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brodycruce
26.08.2019 •
Mathematics
Anumber is (1\7) of another number. the difference of the numbers is 18. (assume that you are subtracting the smaller number from the larger number.) find the numbers.
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Ответ:
x - 1/7x = 18
since there is no number in front of the first x it is an implied 1. In order to subtract we need an equivalent fraction with a common denominator so we change 1 to 7/7.
Now we can subtract
7/7x - 1/7x = 18
6/7x = 18
divide each side by 6/7 (multiply 18 × the reciprocal)
x = 18/1 × 7/6
x = 126/6
x = 21
Ответ:
Louise's answer is false because she had to calculate first the numbers in the brackets and she didn't do it.
Hope this helps !
Photon