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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_
1,216 co chu so tan cung la 2
2,221 co chu so tan cung la 4
3,226 co chu so tan cung la 6
4,251 co chu so tan cung la 8
\(2(x-51)=2\cdot2^3+20\)
\(2(x-51)=2\cdot8+20\)
\(2(x-51)=16+20\)
\(2(x-51)=36\)
\(x-51=36:2\)
\(x-51=18\)
\(x=18+51\)
\(x=69\)
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!!!
\(2\times\left(x-51\right)=2\times2^3+20\)
\(2\times\left(x-51\right)=2^4+20\)
\(2\times\left(x-51\right)=16+20\)
\(2\times\left(x-51\right)=36\)
\(x-51=36:2\)
\(x-51=18\)
\(x=18+51\)
\(x=69.\)
\(70-5\times\left(x-3\right)=45\)
\(5\times\left(x-3\right)=70-45\)
\(5\times\left(x-3\right)=25\)
\(x-3=25:5\)
\(x-3=5\)
\(x=5+3\)
\(x=8.\)
a) 60 - 3.(x - 2) = 51
3.(x - 2) = 60 - 51
3.(x - 2) = 9
x - 2 = 9 : 3
x - 2 = 3
x = 3 + 2
x = 5
b) 4x - 20 = 25 : 22
4x - 20 = 23
4x - 20 = 8
4x = 8 + 20
4x = 28
x = 28 : 4
x = 7
60 - 3 ( x - 2 ) = 51
57 ( x - 2 ) = 51
x - 2 = 57 - 51
x - 2 = 6
x = 6 + 2
x = 8
a) (x-51)=2.8+20 b) 4.(x-3) = 49-1 c) 2x-49=5.27 d) 9.(x+4)-25=5.4
x-51 =16+20 4.(x-30)=48 2x-49=135 9.(x+4)-25=20
x-51 =36 x-30=48:4 2x =135+49 9.(x+4) =20+25
x = 36+51 x-30= 12 2x =184 9.(x+4) =45
x = 87 x =12+30 x=42 x =184:2 x= 92 x+4 =45:9
x+4 =5
x =5-4 x=1
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[x-51]=30,648
x-51=30,648/2
x-51=15,324
x=15,324+51
x=66,324
vậy x=66,324