3)Tìm X:
a, X+\(\dfrac{1}{4}\) = \(\dfrac{5}{8}\) b,7:X=\(\dfrac{1}{21}\) c, X-\(\dfrac{2}{3}\)=\(\dfrac{3}{5}\):\(\dfrac{4}{7}\) d,\(\dfrac{5}{6}\)x\(\dfrac{5}{6}\):X=3 e,320-\(\dfrac{2}{5}\)xX=300
g,X:50+X:20=70 h,...
Đọc tiếp
3)Tìm X:
a, X+\(\dfrac{1}{4}\) = \(\dfrac{5}{8}\) b,7:X=\(\dfrac{1}{21}\) c, X-\(\dfrac{2}{3}\)=\(\dfrac{3}{5}\):\(\dfrac{4}{7}\) d,\(\dfrac{5}{6}\)x\(\dfrac{5}{6}\):X=3 e,320-\(\dfrac{2}{5}\)xX=300
g,X:50+X:20=70 h, 20:X+30:X+4:8:X=\(50\dfrac{1}{2}\)
