A friend and I are completely stumped on this prompt, and are even having trouble seeing how its statement is true. Any help will be appreciated!
Prove that if $a \equiv b \pmod{3}$, then $2a \equiv 2b \pmod{3}$.
A friend and I are completely stumped on this prompt, and are even having trouble seeing how its statement is true. Any help will be appreciated!
Prove that if $a \equiv b \pmod{3}$, then $2a \equiv 2b \pmod{3}$.