Question

tìm x biết

1/3.x+2/5.(x+1)=0

2^x+2^x+3=144

Answer 1

a) 1/3x+2/5(x+1)=0 1/3x+2/5x+1*2/5=0 (1/3+2/5)x+2/5=0 11/15x=0-2/5 11/25x=-2/5 X=-2/5:11/15 X= -2/5*15/11 X=-6/11 Câu b hình như sai đề r bạn