a/3+1+(2a+1)/3=0
a/3+1+2/3a+1/3=0
a/3+2/3a=-1-1/3
a=-4/3
选C方程4x-1.5/0.5=1-x-1.1/0.1将小数化为整数变形得40x-15/( )=1-( )/1.(4x-1.5)/0.5=1-x-1.1/0.1将小数化为整数变形得（40x-15）/( 5)=1-(11 )/1.你要注意加括号，否则答案不一样