Question

Alex is working on the equation 4X - 5 = 7. The first thing he does is divide the whole equation by 4. He writes 4X/4 - 5/4 =7/4. He thinks he may have done something wrong. Has he ? Justify your answer.

Answer 1

Answer:

Yes. Alex had done wrong step that is dividing whole equation by 4 without this step he can solve equation very easily as follows :

Step-by-step explanation:

The given equation is

4x - 5 = 7

4x = 7+5

4x = 12

x = 12/4

x = 3

There fore, 3 is solution of equation.