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Mathematics
Millie
13 June, 19:04
How to solve |-7n+1| / 9 = 2
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Chad Nielsen
13 June, 21:44
0
n = - 17/7 and n = 19/7
Step-by-step explanation:
|-7n + 1|/9 = 2
First multiply both sides by 9 to get rid of the fraction on the left ...
|-7n + 1| = 18
When solving absolute value you set up 2 equations (since |x| = x and |-x| = x)
We have
-7n + 1 = 18
and
-7n + 1 = - 18
Now solve both for n ...
-7n + 1 = 18
-7n = 17
n = - 17/7
-7n + 1 = - 18
-7n = - 19
n = 19/7
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