a 5/4-x=1
b x+4=1/5
c x-1/5=2
d x+5/3=1/81
a 3/7×14/5
b 35/9×81/7
c28/17×68/14
d 35/46×23/205
2 câu trả lời
a) 5/4-x=1
x=5/4-1
x=1/4
b) x+4=1/5
x=1/5-4
x=-3.8
c)x-1/5=2
x=2+1/5
x=11/5
d)x+5/3=1/81
x=1/81-5/3
x=-134/81
a)3/7×14/5=6/5
b) 35/9×81/7=45
c) 28/17×68/14=8
d) 35/46×23/205=7/82
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