Question

525-3×a=147 DAU COROANA!! VA ROG URGENT!!!! DATI SI SCHEMA ADICA CUM FACETI!!​

Answer 1

525-3•a=147
525-3a=147
3a=525-147
3a=378
a=378:3
a=128
Coroana?

Answer 2

$\it 525-3a=147 \Rightarrow 525-147=3a \Rightarrow 378=3a \Rightarrow 3a=378|_{:3} \Rightarrow a=126$