Question

Solve the equation 12 + 2n = 20 for n.
A) -4
B) 0
C) 1
D) 4

Answer 1

12 + 2n = 20

2n = 20 - 12

2n = 8

n = 4

Answer D) 4

Answer 2

Hey there.

12 + 2n = 20
Subtract 12 from both sides of the equation. This isolates our variable.
2n = 8
Divide both sides by 2, the number that's being multiplied by our variable. This isolates and solves for our variable.
n = 4; Your answer is D.)

I hope this helps!