Question

In what step is there first an error. Please explain the error, what misunderstandings the student has and

how to correctly work the problem.
Given: 2(10 −13) +9 = −34 + 60
Step 1: 20 − 26 + 9 = −34 +60
Step 2: 17 = −34 +40
Step 3: 51x = 40
Step 4: =
40
51
Answer:

Answer 1

step 2 is their first error

Explanation:

they made the wrong calculations.

`20-26=-6`

`-6+9=-34 +60`

`3=-34+60`

all that's left to do is to add -34 and 60

`3=26`

they solved the left side of the equation and randomly subtracted 20 from the 60 and moved it to the left side. It was supposed to be -17. Then they moved -34 to the left side of the equation and added an x out of nowhere.