2 câu trả lời
C1: a:4+a:3+a:3=1000
<=> $\frac{a}{4}$ + $\frac{2a}{3}$ = 1000
<=> $\frac{3a}{12}$ + $\frac{8a}{12}$ =1000
<=> $\frac{11a}{12}$ =1000
<=> 11a= 12000
<=> a= $\frac{12000}{11}$
C2: a:4+a:3+a:3=1000
<=> a x ($\frac{1}{4}$ + $\frac{1}{3}$+ $\frac{1}{3}$ )= 1000
<=> a x $\frac{11}{12}$ =1000
<=> a= $\frac{12000}{11}$