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,

$\frac{-1}{5}n+7=2$

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

$\frac{-1}{5}n=2-7$

$\Rightarrow \frac{-1}{5}n=-5$

$\Rightarrow {-1}n=-5\times5$

$(-1\times n = -n)$

$\Rightarrow -n=-25$

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

Hence, n=25