﹙3分之4A-18﹚除以2乘以3=A

问题描述:

﹙3分之4A-18﹚除以2乘以3=A

[(4/3)A-18]/2=A/3
两边同时乘以6
3*[(4/3)A-18]=2A
4A-54=2A
2A=54
A=27