2*X-138=8*9
231-(X-6)=1339:13
70-5*(X-3)=45
10+2*X=16
Tìm số tự nhiên x,biết
70-5.(x-3)=45
10+2.x=45:43
2.x-138=23.32
231-(x-6)=1339:12
\(70-5\cdot\left(x-3\right)=45\)
\(\Rightarrow5\cdot\left(x-3\right)=70-45\)
\(\Rightarrow5\cdot\left(x-3\right)=25\)
\(\Rightarrow x-3=\dfrac{25}{5}\)
\(\Rightarrow x-3=5\)
\(\Rightarrow x=5+3=8\)
==============
\(10+2\cdot x=4^5:4^3\)
\(\Rightarrow10+2\cdot x=4^2\)
\(\Rightarrow10+2\cdot x=16\)
\(\Rightarrow2\cdot x=16-10\)
\(\Rightarrow2\cdot x=6\)
\(\Rightarrow x=\dfrac{6}{2}=3\)
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\(2\cdot x-138=2^3\cdot3^2\)
\(\Rightarrow2\cdot x-138=72\)
\(\Rightarrow2\cdot x=72+138\)
\(\Rightarrow2\cdot x=210\)
\(\Rightarrow x=\dfrac{210}{2}=105\)
==============
\(231-\left(x-6\right)=1339:12\)
\(\Rightarrow231-x+6=1339:12\)
\(\Rightarrow237-x=\dfrac{1339}{12}\)
\(\Rightarrow x=237-\dfrac{1339}{12}\)
\(\Rightarrow x=\dfrac{1505}{12}\)
A. 2.x- 138 = 2^3 .3^2= ??
B. 231 - (x - 6) = 1339 : 13 = ??
a. \(2x-138=2^3.3^2\\ \Leftrightarrow2x-138=72\\ \Leftrightarrow2x=210\\ \Leftrightarrow x=105\)
b. \(231-\left(x-6\right)=1339:13\\ \Leftrightarrow231-\left(x-6\right)=103\\ \Leftrightarrow x-6=128\\ \Leftrightarrow x=134\)
a) 10+2.x=4 mũ 5 4 mũ 3
b)2.x-138= 2 mũ 3. 3 mũ 2
c)231-(x-6)=1339:13
Tìm số tự nhiên x biết :
a) 10 + 2 . x = 45 : 43
b) 2 . x - 138 = 23 . 32
c) 231 - (x -6) = 1339 : 13
d) x + 5 . 2 - (32 +16 . 3 : 6 - 15) =0
Ai giải nhanh mà giải đúng cách và chi tiết mik tick cho nha !
a, 10 + 2x = 45 ÷ 43
10 + 2x = 45/43
2x = 45/43 - 10
2x = -385/43
x = -385/43 ÷ 2
x = -385/86
b, 2x - 138 = 23.32
2x - 138 = 736
2x = 736 + 138
2x = 874
x = 874 ÷ 2
x = 437
c, 231 - ( x - 6 ) = 1339 ÷ 13
231 - ( x - 6 ) = 103
x - 6 = 231 - 103
x - 6 = 128
x = 128 + 6
x = 134
d, x + 5.2 - ( 32 + 16.3 ÷ 6 - 15 ) = 0
x + 10 - 25 = 0
x + 10 = 0 + 25
x + 10 = 25
x = 25 - 10
x = 15
a) 10 + 2 . x = 45 : 43
2 . x = 45/43 -10
2 . x = -385/43
x = -385/43 : 2
x = -385/86
b) 2 . x - 138 = 23 . 32
2 . x - 138 = 736
2 . x = 736+138
2 . x = 874
x = 874 : 2
x = 437
c) 231 - (x -6) = 1339 : 13
231 - (x -6) = 103
x - 6 = 231 -103
x - 6 = 98
x = 98 +6
x = 104
d) x + 5 . 2 - (32 +16 . 3 : 6 - 15) = 0
x + 5 . 2 - (32 + 48 : 6 - 15) = 0
x + 5 . 2 - (32 + 8 - 15) = 0
x + 5 . 2 - 25 = 0
x + 10 - 25 = 0
x + 10 = 0 + 25
x + 10 = 25
x = 25 - 10
x = 15
Tìm x
1+40÷x=21
2×x-138=2^3×3^2
10+2×x=4^5÷4^3
10×x-20=10^2
42=39×42-37×42
(X-5)-100=0
231-(x-6)=1339÷13
8 (x-3)=0
1+40/x=21
40/x=21-1
40/x=20
x=40/20
x=2
2 .x - 138 =23 . 32
231 - ( x - 6 ) = 1339 : 13
231 - ( x - 6 ) = 1339 : 13
231 - ( x - 6 ) = 103
x - 6 = 231 - 103
x - 6 = 128
x = 128 + 6
x = 134
2 . x - 138 = 23 . 32
2 . x - 138 = 8 . 9
2 . x - 138 = 72
2 . x = 72 + 138
2 . x = 210
x = 210 : 2
x = 105
231 - ( x - 6 ) = 1339 : 13
231 - (x - 6) = 1339/13
x - 6 = 231 - 1339/13
x - 6 = 128
x = 128 + 6
x = 134
A ) 2.x-138=23.32
B) 231-(x-6)=1339:13
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
a. 2.x-138=23.32
2.x-138=8.9
2.x-138=72
2.x=72+138
2.x=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
bn nhớ cho mk nha!
a)2.x-138=23.22
b)231-( x-6) =1339:13
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
nếu đúng thì tick cho mình nha các bạn
Tìm số tự nhiên x
A 2× x -138 = 2^3 × 3^2
B 231 -( x -6) =1339 :13