раскрой скобки

45 u-63+27=234

45 u=234+63-27

45u=270

u=270:45

u=6

Verified answer

(15u - 21)*3 +27=234

45u - 63 +27=234

45u = 234+63-27

45u = 270

u = 270:45

u = 6