Question
A student solved the equation
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=45
Identify the property used to arrive at Line 1. Response area
Identify the property used to arrive at Line 2. Response area
What line has a mistake? Response area
What should have been the correct answer for that line?
The property used to arrive at Line 1 is the distributive property.
The property used to arrive at Line 2 is combining like terms.
Line 4 has a mistake.
The correct answer for Line 4 should be x = 5.