2 câu trả lời
Đáp án:
a,1/28
b,2/9
Giải thích các bước giải:
a, x=2323/4646-1313/2828=1/28
b,x=23/69-17/153=2/9
Chúc e hc tốt nhaa<33
a, $\dfrac{1313}{2828}$ + x = $\dfrac{2323}{4646}$
x = $\dfrac{2323}{4646}$ - $\dfrac{1313}{2828}$
x = $\dfrac{1}{2}$ - $\dfrac{13}{28}$
x = $\dfrac{14}{28}$ - $\dfrac{13}{28}$
x = $\dfrac{1}{28}$
b, $\dfrac{23}{69}$ - x = $\dfrac{17}{153}$
x = $\dfrac{23}{69}$ - $\dfrac{17}{153}$
x = $\dfrac{1}{3}$ - $\dfrac{1}{9}$
x = $\dfrac{6}{18}$ - $\dfrac{2}{18}$
x = $\dfrac{2}{9}$
$\text{Xin hay nhất cho nhóm}$