Property used to arrive at Line 1: Distributive Property
Property used to arrive at Line 2: Combining Like Terms
The mistake is in Line 4. The correct answer should have been x=5, not x=45.
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? Response area
1 answer
1 answer