Question

-5n-12=-7n+28 solve the equation

Answer 1

n=20

Explanation:

-5n-12 =-7n+28

plus 7n to each side

2n - 12 = 28

add 12 to each side

2n=40

divde by 2 to isolate the n.

you get n=20

Answer 2

n = 20

Explanation:

Add 7n to both sides.

-5n + 7n - 12 = 2n - 12.

-7n + 7n + 28 = 28.

Now the equation is 2n - 12 = 28.

Add 12 to both sides to isolate the variable.

2n - 12 + 12 = 2n.

28 + 12 = 40.

Now the equation is 2n = 40. Divide both sides by 2.

n = 20.