Question

An equation and the steps to solve it are shown below:

7x − one over two (8x + 4) = 6

Step 1: 7x − 4x − 2 = 6
Step 2: 3x − 2 = 6
Step 3: 3x − 2 + 2 = 6
Step 4: 3x = 6
Step 5: x = 2

Which step was the error made and why?

Answer 1

Step 3

Explanation:

There is no reason as to why they have done -2+2. Surely, the 2 moves to the other side which means it is:

3x=6+2

3x=8

X=8/3.