Question

find the value of y
12 = 3y - 9​

Answer 1

$\underline{\sf\blue{ᴀɴꜱաɛʀ}}$

$\rightarrowtail$ 12 = 3y - 9

$\rightarrowtail$ 3y = 12 + 9

$\rightarrowtail$ 3y = 21

$\rightarrowtail$ y = 21/3 = 7

$\maltese$ Verification :

7 x 3 = 21

21 - 9 = 12

$\rightarrowtail$ 12 = 21 - 9

$\implies$ Hence, proved that LHS = RHS !