Tìm số nguyên x :

a

\(x + 55 = 200\)

\(x = 200 - 55\)

\(x = 145\)

b

\(3.\left( {x + 5} \right) - 17 = 37\)

\(3.\left( {x + 5} \right) = 54\)

\(x + 5 = 18\)

\(x = 13\)