Question

Write a two column proof for the following proof. 1/2x - 5 = 10, then x = 30

Answer 1

x =30

Explanation:

1/2 x -5 =10

add 5 to both sides

1/2 x -5 +5 = 10 +5

simplify the arithmetic

1/2 x =10 +5

1/2 x =15