Munje9nnelainl
Answered

A student is asked to solve the equation below and to justify her/his steps. Identify what, if anything, is incorrect in her/his math or justification.


x + 4 = –8


Step

Justification

x + 4 = –8

Given

x + 4 + (–4) = –8 + (–4)

Addition property of equality

x = –4


AThe student mislabeled the work in the step 2 as "Addition property of equality."
BThe student improperly applied the "Addition property of equality" in step 2.
CThe student added improperly and got the wrong answer in step 3.
DThere is no error. The student's justification is correct.

Verified Answer :

taskmasters

This should be the correct solution

x + 4 = -8
x + 4 + (-4) = -8 + (-4)
x + 0 = -12
x = -12

C. The student added improperly and got the wrong answer in step 3.

The student failed to consider the negative signs of 8 and 4.



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