Tìm x:
\(200-18:\left(327:3\times x-1\right)-28=166\)
TÌM X:
200-18:(372:3:x-1)-28=166
200 - 18 : ( 372 : 3 : X - 1 ) - 28 = 166
200 - 18 : ( 372 : 3 : X - 1 ) = 166 + 28
200 - 18 : ( 372 : 3 : X - 1 ) = 194
200 - 18 : ( 124 . X - 1 ) = 194
18 : ( 124 . X - 1 ) = 200 - 194
18 : ( 124 . X - 1 ) = 6
124 . X - 1 = 18 : 6
124 . X - 1 = 3
124 . X = 3 + 1
124 . X = 4
X = 4 : 124
X = 1/31.
200-18:(372:3:x-1)-28=166
200-18:(372:3:x-1)=166+28
200-18:(372:3:x-1)=194
18:(372:3:x-1)=200-194
18:(372:3:x-1)=6
372:3:x-1=18:6
372:3:x-1=3
124:x-1=3
124:x=3+1
124:x=4
x=124:4
x=31
200 - 18 : ( 372 : 3 : X - 1 ) - 28 = 166
200 - 18 : ( 372 : 3 : X - 1 ) = 166 + 28
200 - 18 : ( 372 : 3 : X - 1 ) = 194
200 - 18 : ( 124 . X - 1 ) = 194
18 : ( 124 . X - 1 ) = 200 - 194
18 : ( 124 . X - 1 ) = 6
124 . X - 1 = 18 : 6
124 . X - 1 = 3
124 . X = 3 + 1
124 . X = 4
X = 4 : 124
X = 1/31.
tìm x biết 200 - 18:( 372 : x - 1)- 28 =166
200 - 18 : (372 : x - 1) - 28 = 166
200 - 18 : (372 : x - 1) = 166 + 28
200 - 18 : (372 : x - 1) = 194
18 : (372 : x - 1) = 200 - 194
18 : (372 : x - 1) = 6
372 : x - 1 = 18 : 6
372 : x - 1 = 3
372 : x = 3 + 1
372 : x = 4
x = 372 : 4
x = 93
\(200-18:\left(272:x-1\right)-28=166\)
\(-18:\left(272:x-1\right)=-6\)
\(272:x-1=3\)
\(272:x=4\)
\(x=93\)
\(200 - 18 : ( 372 : x - 1 ) - 28 = 166\)
\(⇒200 - 28 - 18 : ( 372 : x - 1 )=166\)
\(⇒172 - 18 : ( 372 : x - 1 ) =166\)
\(⇒ 18 : ( 372 : x - 1 ) = 172 - 166\)
\(⇒ 18 : ( 372 : x - 1 ) = 6\)
\(⇒ ( 372 : x - 1 ) = 18 : 6\)
\(⇒ ( 372 : x - 1 ) = 3\)
\(⇒ 372 : x = 3+1\)
\(⇒ 372 : x = 4\)
\(⇒ x = 372 : 4\)
\(⇒ x = 93\)
\(^ofer\)
Tìm x:
200-18:(373:3x x-1)-28=166
200-18:(372:3.X-1)-28=166
200-18:(372:3.X-1) =166+28
200-18:(372:3.X-1) =194
200-18:(124.X-1) =194
18:(124.X-1) =200-194
18:(124.X-1) =6
124.X-1 =18:6
124.X-1 =3
124.X =3+1
124.X =4
X =4:124
X =1/31 .
bài 1: 200 -18 : [ 372 : 3 : X - 1] - 28 -166
\(\Leftrightarrow18:\left[124:x-1\right]=6\)
\(\Leftrightarrow124:x-1=3\)
hay x=31
tìm x:
200 - 18 : ( 372 : 3 : x - 1 ) - 28 = 166
giải rõ ràng từng phần cho mk nhé!
200 - 18 : ( 372 : 3 : x - 1 ) - 28 = 166
=> 200 - 18 : ( 124 : x - 1 ) - 28 = 166
=> 200 - 28 - 18 : ( 124 : x - 1) = 166
=> 172 - 18 : (124 : x - 1) = 166
=> 18 : (124 : x - 1) = 172 - 166 = 6
=> 124 : x - 1 = 18 : 6 = 3
=> 124 : x = 3 + 1 = 4
=> x = 124 : 4 = 31
Bài làm
200 - 18 : ( 372 : 3 : x - 1 ) - 28 = 166
200 - 18 : ( 124 : x - 1 ) - 28 = 166
172 - 18 : ( 124 : x - 1 ) = 166
18 : ( 124 : x - 1 ) = 6
( 124 : x - 1 ) = 18 : 6
124 : x - 1 = 3
124 : x = 4
x = 31
Vậy x = 31
# Học tốt #
200 - 18 : ( 372 : 3 : x - 1 ) - 28 = 166
200 - 18 : ( 372 : 3 : X -1 ) -28 = 166
suy ra 18 : ( 372 : 3 : X - 1 ) - 28 = 200 -166 = 34
Suy ra 18 : ( 372 : 3 : X -1 ) = 34 + 28 = 62
Suy ra 372 : 3 : X -1 = 18 : 62
Suy ra 124 : x -1 = 9/31
Suy ra 124 : x = 9/31 +1 =40/31
Suy ra X = 124 : 40/31
Suy ra X = 961/10 = 96,1
200-18:(372:3.x-1)-28=166
200-18:(372:3.X-1)-28=166
200-18:(372:3.X-1) =166+28
200-18:(372:3.X-1) =194
200-18:(124.X-1) =194
18:(124.X-1) =200-194
18:(124.X-1) =6
124.X-1 =18:6
124.X-1 =3
124.X =3+1
124.X =4
X =4:124
X =\(\frac{1}{31}\).
tinh x
a - 420 : ( x : 39 ) = 105
b - 200 - 18 : ( 372 : 3 x - 1 ) - 28 = 166
a) -420 :(x:39)=105
x:39=-420 : 105
x : 39=\(\dfrac{-14}{5}\)
x=\(\dfrac{-546}{5}\)
a - 420 : ( x : 39 ) = 105
⇒ x : 39 = 420 : 105
⇒ x : 39 = 4
⇒ x = 4 * 39
⇒ x = 156
b)-200 -18 :(372 : x-1)-28=166
-200-18 :(372:x-1)=194
18:(372:x-1)=-200-194
18:(372:x-1)=-394
372:x-1=-9/197
372:x=-9/197+1
372:x=188/197
x=\(\dfrac{18321}{47}\)
`câu 11;
200 - 18 : [372 ; 3 + x -1 ] - 28 = 166
200 - 18 : (372 : 3 + x - 1) - 28 = 166
=> 200 - 18 : (124 + x - 1) = 166 + 28
=> 200 - 18 : (124 + x - 1) = 194
=> 18 : (124 + x - 1) = 200 - 194
=> 18 : (124 + x - 1) = 6
=> 124 + x - 1 = 18 : 6
=> 124 + x - 1 = 3
=> 124 + x = 4
=> x = 4 - 124 = -120
200-18:(372:3+x-1)-28=166
200-18:(372:3+x-1)=166+28
200-18:(372:3+x-1)=194
18:(372:3+x-1)=200-194
18:(372:3+x-1)=6
(372:3+x-1)=18:6
(372:3+x-1)=3
(124+x-1)=3
124+x=3+1
124+x=4
x=4-124
x=-120
vậy x=-120