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Evgen [1.6K]
3 years ago
6

28.

Mathematics
1 answer:
Artyom0805 [142]3 years ago
7 0

Answer:

50

Step-by-step explanation:

30% * n = 15

Change to decimal form

.30 *n = 15

Divide each side by .30

.30n/.30 = 15/.30

n =50

The number is 50

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Bob can buy 15 cupcakes for the price of 18 cookies.

Step-by-step explanation:

  • Assume the cost of a cookie is $x, the cost of a brownie is $y and the cost of a cupcake is $z.
  • It is given that 6 cookies and 2 brownies cost the same, so 6x = 2y, take this as equation 1.
  • It is also given that 4 brownies cost the same as 10 cupcakes, so           4y = 10z, take this as equation 2.
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Step-by-step explanation:

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