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a) x + 5,28 = 9,19 b) x - 34,87 = 58,21 c) x + 37,66 = 80,94
x = 9,19 - 5,28 x = 58,21 + 34,87 x = 80,94 - 37,66
x = 3.91 x = 89.08 x = 43,28
a, x+5,28=9,19 c, x+37,66=80,84
x=3,91 x=43,18
b, x-34,87=58,21 d, 76,22-x=38,08
x=93,08 x=38,14
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76,22 - y x 3 = 30,61 x 2
76,22 - y x 3 = 61,22
y x 3 = 76,22 - 61,22
y x 3 = 15
y = 15 : 3
y = 5
HT và $$$
76,22 - y x 3 = 61,22
y x 3 = 76,22 -61,22
y x 3 = 15
y = 15 : 3
y = 5
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(25,5+y-12,5=4.7\)
⇔\(13+y=28\)
⇔\(y=15\)
b)\(76,22-y-25,7=30+5,52\)
⇔\(50,52-y=35,52\)
⇔\(y=15\)
c)\(4,5-y+1,2=3,5\)
⇔\(5,7-y=3,5\)
⇔\(y=2,2\)
\(a,\Rightarrow10+y=28\\ \Rightarrow y=18\\ b,\Rightarrow50,52-y=35,52\\ \Rightarrow y=15\\ c,\Rightarrow5,7-y=3,5\\ \Rightarrow y=2,2\)
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76,22 - x = 19,08
x = 76,22 - 19,08
x = 57,14
vậy x = 57,14
x = 76,22 - 19,08
x = 57,14