2/3x+4=30x2又1/3
2x/3 = 70-4
2x/3 = 66
x= 99
3/4x-3/8=1.75
3x/4 = 17/8
x= 17/6
8-4.5x=3又1/2
9x/2 = 9/2
x= 1
有什么不明白可以对该题继续追问
请及时选为满意答案,