、计算下面各题:
1、解方程:
X-
frac{3}{4}
4
3
=
frac{5}{8}
8
5
X+
frac{2}{7}
7
2
=
frac{2}{3}
3
2
frac{13}{24}
24
13
-X =
frac{3}{8}
8
3
frac{1}{5}
5
1
+X =
frac{2}{3}
3
2
3X-0.3=0.9 4y+0.8 = 1.2
、计算下面各题:
1、解方程:
X-
frac{3}{4}
4
3
=
frac{5}{8}
8
5
X+
frac{2}{7}
7
2
=
frac{2}{3}
3
2
frac{13}{24}
24
13
-X =
frac{3}{8}
8
3
frac{1}{5}
5
1
+X =
frac{2}{3}
3
2
3X-0.3=0.9 4y+0.8 = 1.2