A student solved the equation: x + 2 (x+1) = 17

Question

Line 1: x + 2x + 1 = 17
Line 2: 3x + 1 = 17
Line 3: 3x = 16
Line 4: x = 16/3

Identify the Property used to go from Line 2 to Line 3:

Which line has a mistake?

What should have been the correct answer for the equation?

Word bank:

Distributive Property
Subtraction Property of Equality
Combine like terms
Multiplication Property of Equality
Line 1
Line 2
Line 3
Line 4
No solution
x =5
x = 45
x = 15

Answer 1

The property used to go from Line 2 to Line 3 is the Subtraction Property of Equality.

There is no mistake in the lines provided.

The correct answer for the equation is x = 16/3.

Answer 2

use the answers in the word bank

Answer 3

The Property used to go from Line 2 to Line 3 is the Subtraction Property of Equality.

The mistake is in Line 3.

The correct answer for the equation should have been x = 5.