Question

2/5n +7= 12. solve for n

Answer 1

$\frac{2}{5n} + 7 = 12 \\ \frac{2}{5n} = 12 - 7 = 5 \\ 5n = 5 \times 2 = 10 \\ n = \frac{10}{5} \\ n = 2$

Answer 2

Answer:

2/5n +7 = 12

2/5n = 12-7

2/5n = 5

2 = 25 n

n = 2/25