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mamaluj [8]
3 years ago
8

Twice the sum of a number and 9 is equal to 6

Mathematics
1 answer:
jenyasd209 [6]3 years ago
5 0
2(n+9)=6  divide both sides by 2

n+9=3  subtract 9 from both sides

n=-6

check

2(-6+9)=6

2(3)=6

6=6
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