﹚(12+x﹚÷2=79×﹙x﹢6﹚=2x﹙14+11x﹚168-5x=9x.x+4=40-x-87×﹙x-2﹚=2x+3
6×﹙2x-7﹚=5×﹙x﹢8﹚+24.5-0.36x=6-0.51x1500x=1200×﹙9-x﹚
x÷5+9=2130÷x+25=85
会做哪道就做哪道吧!