Question

-1/5 n + 7 equals 2 what value of n makes this equation true

Answer 1

I got -25.

1) -1/5n +7 = 2
2) -1/5n=-5
3) n=25

Answer 2

The value of n should be 25 to make the equation true.

Solution:

Given,

`(-1)/(5)n+7=2`

On grouping the terms and bringing the unknown value to the other side we get,

`(-1)/(5)n=2-7`

`\Rightarrow (-1)/(5)n=-5`

`\Rightarrow {-1}n=-5*5`

`(-1* n = -n)`

`\Rightarrow -n=-25`

On cancelling - on both the sides, we get n=25.

Hence, n=25