a) 216 +(102-x) = 347
216 + 102 - x = 347
318 - x = 347
x = -29
b) 127 - (x+29) = 93
127 - x - 29 = 93
127 - 29 - x = 93
98 - x = 93
x = 5
c) ( x - 57) - 119 = 0
x - 57 - 119 = 0
x - (57+119) = 0
x - 176 = 0
x = 176
a, 216+(102-x)=347
102-x=347-216
102-x=131
x=102-131
x=-29
Vậy x=-29
b, 127-(x+29)=93
x+29=127-93
x+29=34
x=34-29
x=5
Vậy x=5
c, (x-57)-119=0
x-57=0+119
x-57=119
x=119+57
x=176
Vậy x=176
\(216+102-x=347\)
<=> \(318-x=347\)
<=> \(x=29\)
\(127-\left(x+29\right)=93\)
<=> \(127-x-29=93\)
<=> \(98-x=93\)
<=> \(x=5\)
\(\left(x-57\right)-119=0\)
<=> \(x-57=119\)
<=> \(x=176\)
a)
216+(102-x)=347
102 - x = 347 - 216
102 - x = 131
x = 131 - 102
x = 29 ( và 1 cach giống bn thanh ngân)
b)
127-(x+29)=93
x + 29 = 127 - 93
x + 29 = 34
x = 34 - 29
x = 5 ( và 1 cach giống bn thanh ngân)
c)
(x-57)-119=0
x - 57 = 119 + 0 = 119
x = 119 + 57
x = 176 ( và 1 cach giống bn thanh ngân)
a) \(216+\left(102-x\right)=347\)
\(\Rightarrow102-x=347-216\)
\(\Rightarrow102-x=131\)
\(\Rightarrow x=102-131\)
\(\Rightarrow x=-29\)
Vậy x = -29
b) \(127-\left(x+29\right)=93\)
\(\Rightarrow x+29=127-93\)
\(\Rightarrow x+29=34\)
\(\Rightarrow x=34-29\)
\(\Rightarrow x=5\)
Vậy x = 5
c) \(\left(x-57\right)-119=0\)
\(\Rightarrow x-57=0+119\)
\(\Rightarrow x-57=119\)
\(\Rightarrow x=119+57\)
\(\Rightarrow x=176\)
Vậy x = 176
_Chúc bạn học tốt_
