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rusak2 [61]
3 years ago
11

If the difference between a number and 21 is divided by2, the result is 4 times the number. What is the number

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
6 0
(n-21)/2=4n is the equation

First, divide what is in the parentheses by 2
0.5n-10.5=4n

Then, multiply the whole equation by 2 so we have all whole numbers
n-21=8n

Move N so that it is with 8n
7n=-21

Divide 21 by 7
n=-3

Solution: The number (n) is equal to -3
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