Tim was asked to solve the equation kx = my - mx for x. His solution is shown below.

Start : kx = my - mx

Step 1: kx+mx= my

Step 2: x(k+m) = my

Step 3: x= my/k+m / sign is a fraction bar

In which step did Tim make his FIRST mistake when solving the equation?

A. Step 1
B. Step 2
C. Step 3
D. Tim did not make a mistake.

I think it is 'A'?

Question

Tim was asked to solve the equation kx = my - mx for x. His solution is shown below. 

Start : kx = my - mx

Step 1: kx+mx= my

Step 2:  x(k+m) = my

Step 3: x= my/k+m     / sign is a fraction bar

In which step did Tim make his FIRST mistake when solving the equation?

A. Step 1
B. Step 2
C. Step 3
D. Tim did not make a mistake.

I think it is 'A'?

anonymous · Answer

help

jim_thompson5910 · Answer

does step 3 say

$$\large x = \frac{my}{k+m}$$

OR

does step 3 say

$$\large x = \frac{my}{k}+m$$

mathstudent55 · Answer

I need to ask you a question before we get to any possible mistake.
Can you tell me exactly how Step 3 is written? 
Is it a fraction with k + m in the denominator?