Answer:
True!
Step-by-step explanation:
3(10) - 9
30 - 9
21
Answer: false becuase you would add 9 to both sides simply 3x=19 then 19/3 then if u want to check it just plug 19/3 in the equation then cancel 3 simply 19-9.
Step-by-step explanation: i'm not so sure but hope it helps .
