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a: =>2x+10=4^2=16
=>2x=6
=>x=3
b: =>2x-138=8*9=72
=>2x=138+72=210
=>x=105
c: =>231-(x-6)=103
=>x-6=128
=>x=134
\(a.10+2x=4^5:4^3\\ \Leftrightarrow10+2x=4^2\\ \Leftrightarrow2x=6\\ \Leftrightarrow x=3\)
\(b.2x-138=2^3.3^2\\ \Leftrightarrow2x-138=72\\ \Leftrightarrow x=210:2\\ \Leftrightarrow x=105\)
\(c.231-\left(x-6\right)=1339:13\\ \Leftrightarrow231-\left(x-6\right)=103\\ \Leftrightarrow x-6=128\\ \Leftrightarrow x=134\)
Chú ý : Nếu bạn chưa học \(\Leftrightarrow\) thì bạn bỏ đi nha !
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a) 2x-138=23.32
=>2x-138=8.9
=>2x-138=72
=>2x=72+138
=>2x=210
=>x=210:2
=>x=105
b)231-(x-6)=1339:13
=>231-(x-6)=103
=>x-6=231-103
=>x-6=128
=>x=128+6
=>x=134
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a,2x-138=72 231-(x-6)=103
x-6 =231-103
2x =72+138 x-6 =128
2x =210 x =128+6
x =210/2 x =134
x =105
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(2x-138=72\)
\(=>2x=210\)
\(=>x=210:2=105\)
b)\(231-\left(x-6\right)=103\)
\(=>\left(x-6\right)=231-103\)
\(=>\left(x-6\right)=128\)
\(=>x=128+6=134\)
a) 2x-138=23.32
2x-138=72
2x=72+138
2x=210
x=210/2
x=105
b)231-(x-6)=1339:13
231-(x-6)=103
(x-6)=231-103
x-6=128
x=128+6
x=134
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a. 2x - 138 = 23 . 32
2x = 72 + 138
x = 210 : 2
x = 105
b. 213 - (x - 6) = 1339 : 13
213 - (x - 6) = 103
x - 6 = 213 - 103
x = 110 + 6
x = 116
2.x - 138 = 23 . 32
2.x - 138 = 8 . 9
2.x - 138 = 72
2.x = 72 + 138
2.x = 210
x = 105
b) 231 - (x - 6) = 1339 : 13
231 - x + 6 = 103
231 - x = 103 - 6
231 - x = 97
x = 231 - 97
x = 134
2x-138=23.32
2x-138=72
2x=72+138
2x=210
x=210:2
x=105
231-(x-6)=1339:13
231-(x-6)=103
x-6=231-103
x-6=128
x=128+6
x=134
A) 2.x-138=23.32
2.x-138=8.9
2.x-138=81
2.x =81+138
2.x =219
x=219:2
x=109,5
B) 231-(x-6)=1339:13
231-(x-6)=103
x-6 =231-103
x-6 =128
x =128+6
x=134