作业帮1.解方程(请写出过程)X-7/9X=5/12X+3/4X=1403/5X+20=502.(照样请写出过程,可以不用简便)(1/4-1/8)÷5/122/5×(1/2+1/3)÷4/9[17/12-(3/4_1/6)]÷3/49/13÷27/26-4/9
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![1.解方程(请写出过程)X-7/9X=5/12X+3/4X=1403/5X+20=502.(照样请写出过程,可以不用简便)(1/4-1/8)÷5/122/5×(1/2+1/3)÷4/9[17/12-(3/4_1/6)]÷3/49/13÷27/26-4/9](/uploads/image/z/4113184-40-4.jpg?t=1.%E8%A7%A3%E6%96%B9%E7%A8%8B%28%E8%AF%B7%E5%86%99%E5%87%BA%E8%BF%87%E7%A8%8B%29X-7%2F9X%3D5%2F12X%2B3%2F4X%3D1403%2F5X%2B20%3D502.%28%E7%85%A7%E6%A0%B7%E8%AF%B7%E5%86%99%E5%87%BA%E8%BF%87%E7%A8%8B%2C%E5%8F%AF%E4%BB%A5%E4%B8%8D%E7%94%A8%E7%AE%80%E4%BE%BF%29%281%2F4-1%2F8%29%C3%B75%2F122%2F5%C3%97%281%2F2%2B1%2F3%29%C3%B74%2F9%5B17%2F12-%283%2F4_1%2F6%29%5D%C3%B73%2F49%2F13%C3%B727%2F26-4%2F9)
1.解方程(请写出过程)X-7/9X=5/12X+3/4X=1403/5X+20=502.(照样请写出过程,可以不用简便)(1/4-1/8)÷5/122/5×(1/2+1/3)÷4/9[17/12-(3/4_1/6)]÷3/49/13÷27/26-4/9
1.解方程(请写出过程)
X-7/9X=5/12
X+3/4X=140
3/5X+20=50
2.(照样请写出过程,可以不用简便)
(1/4-1/8)÷5/12
2/5×(1/2+1/3)÷4/9
[17/12-(3/4_1/6)]÷3/4
9/13÷27/26-4/9
1.解方程(请写出过程)X-7/9X=5/12X+3/4X=1403/5X+20=502.(照样请写出过程,可以不用简便)(1/4-1/8)÷5/122/5×(1/2+1/3)÷4/9[17/12-(3/4_1/6)]÷3/49/13÷27/26-4/9
1.
x-7/9x=5/12
x=5/12除7/9
x+3/4x=140
x=140除7/4
3/5x+20=50
3/5=30
x=30除3/5
反抗一下二楼的，人家六年级，你呢？？
（1）X-7/9X=5/12
（1-7/9）x=5/12
(2/9)x=5/12
x=15/8
(2)X+3/4X=140
(1+3/4)x=140
(7/4)x=140
x=80
(3)3/5X+20=50
3/...
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反抗一下二楼的，人家六年级，你呢？？
（1）X-7/9X=5/12
（1-7/9）x=5/12
(2/9)x=5/12
x=15/8
(2)X+3/4X=140
(1+3/4)x=140
(7/4)x=140
x=80
(3)3/5X+20=50
3/5x=-30
x=-50
(1)(1/4-1/8)÷5/12
=(2/8-1/8)÷5/12
=1/8÷5/12
=3/10
(2)2/5×(1/2+1/3)÷4/9
=2/5×5/6÷4/9
=1/3÷4/9
=3/4
(3)[17/12-(3/4_1/6)]÷3/4
=[17/12-7/12]÷3/4
=0
(4)9/13÷27/26-4/9
=2/3-4/9
=2/9
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