Step-by-step explanation:
she took the 2X and substract 4X-2X
the answer will be 2X=402
I think it’s Arrhenius acid I’m not so sure
So if 2 notebooks cost 12 divide that
12/2 =6 $ each
So to check if its true the 3notebooksx $6 dollars each should =$18 for 3 notebooks
5 notebooks at $6 each = $30 for 5 notebooks
so What is 4notebooks x$6 each ? =4x6 = $24 for 4 notebooks