Question

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.

Equation Image - http://imgur.com/KwDanAH


A.
The student mislabeled the work in the second step as “Multiplication property of equality.”
B.
The student improperly applied the multiplication property of equality in the second step.
C.
The student computed the product improperly to arrive at an erroneous answer in step 3.
D.
There is no error. The student’s justification is correct.

Answer 1

@iGreen @Astrophysics

Answer 2

He was supposed to divide 15/17 to both sides..not multiply..B.

Answer 3

Oh!

Answer 4

Yes, it's b :)

Answer 5

should be multiply by 17/15

Answer 6

You have to do the opposite..15/17 was multiplied by the variable y..so you have to divide 15/17 to both sides..

Answer 7

Yeah, or multiply the reciprocal(17/15).