_____ =2k
5
2. 3[4x - (6 - 5x)= 15 - 6(5 - 2x)
3. 2[(2a + 5) + (2a - 5) ]= 32
thx~
更新1:
1. is 4k+6 ____ =2k 5
更新2:
4k+6 ____ =2k 5
更新3:
cityhunter616: sorry...only No.3 right