A student solved the equation x + 2(x+1) = 17 below and showed their work in the table below.

Problem x + 2(x+1) = 17
Line 1: x + 2x + 2 = 17
Line 2: 3x + 2 = 17
Line 3: 3x = 15
Line 4: x = 5

Identify the property used to arrive at Line 2.

1 answer

The property used to arrive at Line 2 is the distributive property.