b) 3/4x - 2/3x + 1 =-5/12
Giải thích
b) 34x−23x+1=−512x.34−23=−512−1x.3.34.3−2.43.4=−512−1212x.912−812=−5+1212x.112=−1712x=−1712:112x=−1712.12x = –17 Vậy x = –17.
b) 34x−23x+1=−512x.34−23=−512−1x.3.34.3−2.43.4=−512−1212x.912−812=−5+1212x.112=−1712x=−1712:112x=−1712.12x = –17 Vậy x = –17.