11+x+32=61+32-21
x=?
Tìm x, biết
a) 21x = 63;
b) 32. |x| = 96;
c) 11x + 5 = 60;
d) 2 . |x| + 5 = 32 - 13.
a) x = 3.
b) x Î {-3; 3}.
c) x = 5.
d) x Î {-7; 7).
Tìm x, biết a) 21x = 63; b) 32. x = 96 c) 11x + 5 = 60 d) 2 . x + 5 = 32 - 13
Tính nhẩm :
72 x 11 =
32 x 11 =
45 x 11 =
61 x 11 =
53 x 11 =
Ai nhanh mik tik
72 x 11 = 792
32 x 11 = 352
45 x 11 = 495
61 x 11 = 671
53 x 11 = 583
72 * 11 = 792
32 * 11 = 352
45 * 11 = 495
61 *11 = 671
53 *11 = 583
72*11=792
32*11=352
45*11= 495
61*11=671
53*11=583
tìm x:
a,[ ( x+32)-17]*2=42
b,[ 61+(53-x)]*17=1785
c,[ ( x^2+54)-32 ] * 2=244
a) => (x+32) - 17 = 42:2 = 21
=> x+32 = 21+17 = 38
=> x=38-32=6
b) => 61+(53-x) = 1785:17=105
=> 53-x = 105-61=44
=> x = 53-44 =9
c) => x^2 +54 -32 = 244:2 = 122
=> x^2 +22 = 122
=> x^2 = 122-2=100
=> x= 10 hoặc -10
giải oy pn **** giùm mk nka
Thực hiện phép tính;
a) 25x(32+47)-32x(25+47)
b) (-11)9:[5x(-11)5-16x(-11)5]
c)125x(-61)x(-2)3x(-1)2n (n thuộc N*)
a) 32 : {160 : [ 360 - (175 + 21x 5)]}
b) (20 x 24 + 12 x 24 - 48 x 22 ) : 26
a) 32 : {160 : [360 - (175 + 21 x 5 )]} =32 : {160 : [360 - 280 ]}
=32 : {160 : 80}
=32 : 2= 16
b) (20 x 24 + 12 x 24 - 48 x 2 mũ 2) : 2 mũ 6 =(20 x 24 + 12 x 24 - 48 x 4) : 64
= (480 + 288 - 192 ) : 64
=576 : 64 = 9
đấy xong rồi
a)32:{160:[360-(175+21x5)]}
=32:{160:[360-(175+105)]}
=32:{160:80}
=32:2
=16
Tính bằng cách thuận tiện nhất :
42 x 3 + 18 x 32 + 18 x 61
42 x 3 + 18 x 32 + 18 x 61
= 6 x 7 x 3 + 18 x 32 + 18 x 61
= 18 x 7 + 18 x 32 + 18 x 61
= 18 x (7 + 32 + 61)
= 18 x 100
= 1800
\(42\times3+18\times32+18\times61\)
\(=6\times7\times3+18\times32+18\times61\)
\(=18\times7+18\times32+18\times61\)
\(=18\times\left(7+32+61\right)\)
\(=18\times100\)
\(=1800\)
6 x 7 x 3 + 18 x 32 +18 x 61
18 x 7 + 18 x32 +18 x 61
18 x ( 7 + 32 + 61 )
18 x 100
1800
Thực hiện phép tính( hợp lí nếu có thể)
a) 49.(51 - 4) - 51.(49 + 4)
b) 71.64 + 32.(-7) - 13.32
c) 11 + (-13) + 15 + (-17) + ... + 59 + (-61)
a)
\( 49.(51 - 4) - 51.(49 + 4)\)
\(=49.51-49.4-51.49-51.4\)
\(=49.(51-4-51)-51.4\)
\(=49.(-4)-51.4\)
\(=4.(-49-51)\)
\(=4.(-100)\)
\(=-400\)
b)
\( 71.64 + 32.(-7) - 13.32\)
\(=71.32.2+32.(-7)-13.32\)
\(=142.32+32.(-7)-13.32\)
\(=32.(142-7-13)\)
\(=32.122\)
\(=3904\)
c)
\( 11 + (-13) + 15 + (-17) + ... + 59 + (-61)\)
\(=(-2)+(-2)+...+(-2)\)
\(=(-2).13\)
\(=-26\)
(X- 3)- 120=0
8x - 3 =0
124+(118-x)=217
156-(x+61)=82
814-(x-305)=712
(X-32)÷16=48
X-32: 16=48
(X-3)-120=0
X-123=0
X=123
8x-3=0
8x=3
x=3/8
124+(118-x)=217
118-x=93
x=25
156-(x+61)=82
x+61=74
x=13
814-(x-305)=712
x-305=102
x=407
(X-32)÷16=48
x-32=768
x=800
X-32: 16=48
x-2=48
x=50
( x - 3 ) - 120 = 0
<=> x - 3 = 120
<=> x = 120 + 3
<=> x = 123
8x - 3 = 0
<=> 8x = 3
<=> x = 3 : 8
<=> x = 3/8
124 + ( 118 - x ) = 217
<=> 118 - x = 217 - 124
<=> 118 - x = 93
<=> x = 118 - 93
<=> x = 25
156 - ( x + 61 ) = 82
<=> x + 61 = 156 - 82
<=> x + 61 = 74
<=> x = 74 -61
<=> x = 13
814 -( x - 305 ) = 712
<=> x - 305 = 814-712
<=> x - 305 = 102
<=> x =102 + 305
<=> x = 407
( x - 32) : 16 = 48
<=> x - 32 = 48 x 16
<=> x - 32 = 768
<=> x = 768 + 32
<=> x = 800
x - 32 : 16 = 48
<=> x - 2 = 48
<=> x = 48 + 2
<=> x = 50
1/ (X - 3) -120 = 0
X - 3 = 0 +120
X - 3 = 120
X = 120 + 3
X = 123
2/ 8X - 3 = 0
8X = 0 + 3
8X = 3
X = 3 : 8
X = 3/8
3/ 124 + ( 118 - X ) = 127
118 - X = 127 - 124
118 - X = 3
X = 118 -3
X = 115
4/ 156 - ( X + 61 ) = 82
X + 61 = 156 - 82
X + 61 = 74
X = 74 - 61
X = 13
5/ 814 - ( X - 305 ) = 712
X - 305 = 814 - 712
X - 305 = 102
X = 102 + 305
X = 407
6/ ( X - 32 ) : 16 = 48
X - 32 = 48 x 16
X - 32 = 768
X = 768 + 32
X = 800
7/ X - 32 : 16 = 48
X - 2 = 48
X = 48 + 2
X = 50