Question

Helpppppppppppppppppp​

Answer 1

Raul's mistake was in step 2

Explanation:

Step 1 ;

`3+5-7`

Step 2 :

`3+2`

This was where Raul made a mistake

5-7 = -2 not +2

So the correct workings are ;

`3+5-7\\\\3-2\\\\=1`