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White raven [17]
3 years ago
15

The sum of three times a number and 12 is twenty

Mathematics
1 answer:
galina1969 [7]3 years ago
3 0
So,

"The sum of three times a number"
3n +

"and 12"
3n + 12

"is 20"
3n + 12 = 20

Subtract 12 from both sides.
3n = 8

Divide both sides by 3.
n =  \frac{8}{3} \ or\ 2 \frac{2}{3}
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