Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
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 !
2.x – 138 = 23.32
2x – 138 = 8.9
2x – 138 = 72
2x = 72 + 138
2x = 210
x = 210 : 2
x = 105
Vậy x = 105
2x - 23.32 = 138
2x - 72 = 138
2x = 138 + 72
2x = 200
x = 200 ÷ 2
x = 100
( 6.x - 34 ).73= 3.74
( 6x - 34 ).343 = 7203
6x - 34 = 7203 ÷ 343
6x - 34 = 21
6x = 21 + 34
6x = 55
x = 55 ÷ 6
x = 55/6
a,2x-23.32=138
2x-72=138
2x=66
x=66:2
x=33
Vậy x=33
b,(6x-34).73=3.74
(6x-34).343=7203
6x-34=21
6x=21+34
6x=55
x=55:6
x=\(\frac{55}{6}\)
Vậy x=\(\frac{55}{6}\)
a: \(3^2+10:2=9+5=14\)
b: \(13\cdot\left(23+17\right)-17\cdot\left(23+13\right)\)
\(=13\cdot23+13\cdot17-17\cdot23-17\cdot13\)
\(=13\cdot23-17\cdot23\)
\(=-4\cdot23=-92\)
c: \(-8+2\left(x-4\right)=2^3\cdot3^2\)
=>\(2\left(x-4\right)-8=8\cdot9=72\)
=>2(x-4)=72+8=80
=>x-4=40
=>x=44
b) 123 - 5.(x+4) = 38
=> 5.(x+4) = 123 - 38
=> 5.(x+4) = 85
=> (x+4) = 85 : 5
=> x+4 = 17
=> x = 17 - 4
=> x = 13
c) 2.x - 138 = 23.32
=>2.x - 138 = 736
=>2.x = 736 + 138
=>2.x = 874
=> x = 874 : 2
=> x = 437
d) 70 - 5.(x-3) = 45
=> 5.(x-3) = 70 - 45
=> 5.(x-3) = 25
=> (x-3) = 25 : 5
=> x-3 = 5
=> x = 5 + 3
=> x = 8
a: Ta có: \(814-\left(x-305\right)=712\)
\(\Leftrightarrow x-305=102\)
hay x=407
b: Ta có: \(2x-138=2^3\cdot2^2\)
\(\Leftrightarrow2x=32+138=170\)
hay x=85
c: Ta có: \(20-\left[7\left(x-3\right)+4\right]=2\)
\(\Leftrightarrow7\left(x-3\right)+4=18\)
\(\Leftrightarrow7\left(x-3\right)=14\)
\(\Leftrightarrow x-3=2\)
hay x=5
a. - (- 94) + (67 - x) : 2 = (- 34 - 14)
b. 73 - (- 20 + 37) = x - (57 - 39)
c. - (- 34 - 23) = x + 37
\(a,-\left(-94\right)+\left(67-x\right):2=\left(-34-14\right)\)
\(94+67-x:2=-48\)
\(161-x:2=-48\)
\(x:2=209\)
\(x=\frac{209}{2}\)
a) \(2x-2^3.3^2=138\)
\(\Rightarrow2x=138+2^3.3^2\)
\(\Rightarrow2x=210\)
\(\Rightarrow x=105\)
Vậy x = 105.
a)2x-96=138
2x=174
x=87
b)(6x-81).343=147
2058x-27783=147
2058x=27930
x=13,57