2(x -51 ) = 2.2^3 + 20
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\(2(x-51)=2\cdot2^3+20\)
\(2(x-51)=2\cdot8+20\)
\(2(x-51)=16+20\)
\(2(x-51)=36\)
\(x-51=36:2\)
\(x-51=18\)
\(x=18+51\)
\(x=69\)
2 ( x - 51 ) = 2 . 23 + 20
2 ( x - 51 ) = 24 + 20
2 ( x - 51 ) = 16 + 20
2 ( x - 51 ) = 36
( x - 51 ) = 36 : 2
( x - 51 ) = 18
x = 18 + 51
x = 69
Vậy x = 69
Tk nhé!!!
\(2\times\left(x-51\right)=2\times2^3+20\)
\(2\times\left(x-51\right)=2^4+20\)
\(2\times\left(x-51\right)=16+20\)
\(2\times\left(x-51\right)=36\)
\(x-51=36:2\)
\(x-51=18\)
\(x=18+51\)
\(x=69.\)
\(70-5\times\left(x-3\right)=45\)
\(5\times\left(x-3\right)=70-45\)
\(5\times\left(x-3\right)=25\)
\(x-3=25:5\)
\(x-3=5\)
\(x=5+3\)
\(x=8.\)
2.(x-51)=2.23+20
=>2.(x-51)=2.(23+10)
=>x-51=23+10
=>x-51=8+10
=>x-51=18
=>x=51+18
=>x=69
\(2\left(x-51\right)=2.2^2+20.\)
\(\Leftrightarrow2x-102=2.4+20\)
\(\Leftrightarrow2x-102=28\)
\(\Leftrightarrow2x=28+102\)
\(\Leftrightarrow2x=130\)
\(\Leftrightarrow x=130\div2\)
\(\Leftrightarrow x=65\)
2( x - 51 ) = 2.22 + 20
2( x - 51 ) = 2.4 +20
2( x - 51 ) = 28
x - 51 = 28 : 2
x - 51 = 14
x = 14 + 51
x = 65
a)4.(x-3)=7.2-1.10
4.(x-3)=14-10
4.(x-3)=4
x-3=4:4
x-3=1
x=1+3
x=4
b)2.(x-51)=2.2.3+20
2.(x-51)=32
x-51=32:2
x-51=16
x=16+51
x=67
c)9.x-1=9
9.x=9+1
9.x=10
x=10:9
x=1,1111111...
(x-2).4=16
x-2=16:4
x-2=4
x=4+2
x=6
a, 2(x - 51) = 2.23 + 20
=> 2(x - 51) = 2.8 + 20
=> 2(x - 51) = 16 + 20
=> 2(x - 51) = 36
=> x - 51 = 18
=> x = 69
vậy_
b, 32(x + 4) - 52 = 5.22
=> 9(x + 4) - 25 = 5.4
=> 9x + 36 - 25 = 29
=> 9x + 9 = 29
=> 9x = 20
=> x = 20/9
vậy_
(x-51) = 2.23 + 20
(x-51) = 2.8 + 20
(x-51) = 16 +20
(x-51) = 36
x = 36 +51
x = 87
vậy x = 87
Tìm x, biết:
a) 198 - ( x + 4 ) = 120
(x+4) = 198-120
x+ 4 =78
x= 78 - 4
x= 74
b) 2(x-51) = 2.23 + 20
2(x-51)=36
x-51 = 36:2
x-51=18
x=18+51
x=69
c) 450 : ( x - 19 ) = 50
x-19= 450:50
x-19=9
x=9+19
x=28
d)4(x-3) = 72 - 110
4(x-3) =48
x-3 = 48:4
x-3=12
x=12+3
x=15
a) 198 - ( x + 4 ) = 120
=>x+4=78
=>x=744
b) 2(x-51) = 2.23 + 20
=>
\(2\left(x-51\right)=2.2^3+20\)
\(\Leftrightarrow2\left(x-51\right)=16+20\)
\(\Leftrightarrow2\left(x-51\right)=36\)
\(\Leftrightarrow x-51=13\)
\(\Leftrightarrow x=64\)
Vậy ..
cho mk hỏi xíu 2,2\(^3\) + 20 hay là 2\(\times\)2\(^3\)+20 vậy