tìm x
231- ( x - 6 ) = 1339 : 13
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231-(x-6)=1339:13
231-(x-6) =103
x -6 = 231-103
x-6 = 128
x=128+6
=>x =134
li-ke
231 – (x- 6) = 1339 : 13
231 – (x – 6) = 103
x – 6 = 231 – 103
x – 6 = 128
x = 128 + 6
x = 134
Vậy x = 134
a) 10 + 2x = 16.4 : 4
=> 10 + 2x = 16
2x = 16 - 10
2x = 6
x = 6:2 = 3
b) 231 - ( x - 6 ) = 1339 : 13
=> 231 - ( x - 6 ) = 103
( x - 6 ) = 231 - 103
x - 6 = 128
x = 128 + 6
x = 134
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 !
a) 124 + (118 - x) = 217
118 - x = 217 - 124
118 - x = 93
x = 118 - 93
x = 25
b) 156 - (x + 61) = 82
x + 61 = 156 - 82
x + 61 = 74
x = 74 - 61
x = 13
c) 219 - 7(x + 1) = 100
7(x + 1) = 219 - 100
7(x + 1) = 119
x + 1 = 119 : 7
x + 1 = 17
x = 17 - 1
x = 16
d) (3x - 6).3 = 3⁴
3x - 6 = 3⁴ : 3
3x - 6 = 3³
3x - 6 = 27
3x = 27 + 6
3x = 33
x = 33 : 3
x = 11
e) 231 - (x - 6) = 1339 : 13
231 - (x - 6) = 103
x - 6 = 231 - 103
x - 6 = 128
x = 128 + 6
x = 134
a) 124 + (118 - x) = 217
118 - x = 217 - 124
118 - x = 93
x = 118 - 93
x = 25
b) 156 - (x + 61) = 82
x + 61 = 156 - 82
x + 61 = 74
x = 74 - 61
x = 13
c) 219 - 7(x + 1) = 100
7(x + 1) = 219 - 100
7(x + 1) = 119
x + 1 = 119 : 7
x + 1 = 17
x = 17 - 1
x = 16
d) (3x - 6) . 3 = 34
(3x - 6) . 3 = 81
(3x - 6) = 81 : 3
(3x - 6) = 27
3x = 27 + 6
3x = 33
x = 33 : 3
x = 11
e) 231 - (x - 6) = 1339 : 13
231 - (x - 6) = 103
(x - 6) = 231 - 103
x - 6 = 128
x = 128 + 6
x = 134
231-(x-6)=1339:13
231-(x-6)=103
x-6=231-103
x-6=128
x=128+6
x=134
\(231-\left(x-6\right)=1339:13\)
\(231-\left(x-6\right)=103\)
\(x-6=231-103\)
\(x-6=128\)
\(x=134\)
231 - (x - 6) = 1339 : 13
=> 231 - (x - 6) = 103
=> x - 6 = 231 - 103
=> x - 6 = 128
=> x = 128 + 6
=> x = 134
Vậy x = 134
231 - ( x - 6 ) = 1339 : 13
231 - x + 6 = 103
231 - x = 103 - 6
231 - x = 97
x = 231 - 97
x = 134
231-(x-6)=1339:13
=>231-(x-6)=103
=>x-6=231-103
=>x-6=128
=>x=128+6
=>x=134
Hk tốt !
\(231-\left(x-6\right)=\frac{1339}{13}\)
\(231-\left(x-6\right)=\frac{1339}{13}=103\)
\(=>231-103=x-6\)
\(=>x-6=128\)
\(=>x=128+6=134\)
\(\Leftrightarrow\)231-x+6=103
\(\Leftrightarrow\)231-x=103-6
\(\Leftrightarrow\)x=231-97
\(\Leftrightarrow\)x=134
231- ( x - 6 ) = 1339 : 13
231- ( x - 6 ) = 103
( x - 6) = 231 - 103
x - 6 = 128
x = 128+6
x= 134