Deepak wrote out the steps to his solution of the equation 5/2 - 3x - 5 + 4x = -7/4 
Step 1: 5/2 - 5 + 4x - 3x = -7/4
Step 2: -5/2 + x + -7/4
Step 3: -5/2 + 5/2 + x = -7/4 + 10/4
Step 4: x = 3/4
Which step has an incorrect instruction?

Solution:

Given:

5/2 - 3x - 5 + 4x = -7/4

By simplifying the equation,

Step1: 

Rewrite the like terms

5/2 - 5 + 4x - 3x = -7/4

Step2:

By addition and subtraction of like terms

-5/2 + x = -7/4

Step3:

By adding 5/2 both sides

-5/2 + 5/2 + x = -7/4 + 10/4

Step4:

By solving the equation

x = 3/4

Therefore, step 2 has an incorrect instruction.

Deepak wrote out the steps to his solution of the equation 5/2 - 3x - 5 + 4x = -7/4 
Step 1: 5/2 - 5 + 4x - 3x = -7/4
Step 2: -5/2 + x + -7/4
Step 3: -5/2 + 5/2 + x = -7/4 + 10/4
Step 4: x = 3/4
Which step has an incorrect instruction?

Summary:

Deepak wrote out the steps to his solution of the equation 5/2 - 3x - 5 + 4x = -7/4. Step 2 has an incorrect instruction.