36.72-36.67=36.(72-67)=36.5=180 {296:[78-(579-30.7):9]}.18={296:[78-369:9]}.18=296:37.18=8.18=144 3x-5=16=3x-5=16+5.3x+5=21.x = 21:3.x = 7 vay x =7 phan kia minh ko bie,bn thong cam cho minh nha.minh can nhgieng cuu
\(36\cdot72-36\cdot67\)
\(=36\left(72-67\right)\)
\(=36\cdot5\)
\(=180\)