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a: Ta có: \(71-\left(x+33\right)=26\)
\(\Leftrightarrow x+33=45\)
hay x=12
b: Ta có: \(\left(x+73\right)-26=76\)
\(\Leftrightarrow x+73=102\)
hay x=29
c: Ta có: \(45-\left(x+9\right)=6\)
\(\Leftrightarrow x+9=39\)
hay x=30
a) 71 - ( 33 + x ) = 26
(33 + x ) = 71 -26
33 + x = 45
x = 45 - 33 = 12
b) ( x + 73 ) - 26 = 76
( x + 73 ) = 102
x = 102 - 73 = 29
c) 45 - ( x + 9 ) = 6
( x + 9 ) = 45 - 6 = 39
x = 39 - 9 = 30
d) 89 - ( 73 - x ) = 20
73 - x = 89 - 20
73 - x = 69
x = 73 - 69 = 4
e) 4(x+41) = 400
x + 41 = 400 : 4 = 100
x = 100 - 41 = 59
f) 11(x-9 ) = 77
x - 9 = 77 : 11 = 7
x = 7 + 9 = 16
g) x + 7 = 25 + 13 = 38
x = 38 - 7 = 31
h) x + 4 = 198 - 120 = 78
x = 78 - 4 = 74
i) x - 9 = 350 : 5 = 70
x = 70 + 9 = 79
j) 2x - 49 = 5 . 9 = 45
2x = 45 + 49 = 94
x = 94 : 2 = 47
k) 25 + 3( x - 8 ) = 106
3(x-8 ) = 106 - 25 = 81
x - 8 = 81 : 3 = 27
x = 27 +8= 35
l) 9( x + 4 ) - 25 = 20
9( x + 4 ) = 20 + 25 = 45
x + 4 =45 : 9 = 5
x = 5 - 4 = 1
m) 200 - ( 2x + 6 ) = 64
2x + 6 = 200 - 64 = 136
2x = 136 - 6 = 130
x = 130 : 2 = 65
Ta có: x+3 +(-2)=5
=> x=5-[3+(-2)]
=> x=4
Vậy số nguyên x=4
4-(27-3)=x-(13-4)
=>-20=x-(13-4)
=>-20=x-9
=> x=-20+9
=> x=-11
Vậy x = -11
4 - 27 + 3 = x - 13 + 4
-x = -13 + 4 - 4 + 27 - 3
-x = 11
=> x = -11
-72 - ( 15 - x ) = -43 - (-13)
-72 - 15 + x = -43 + 13
x = -43 + 13 + 72 + 15
x = -30 + 87
x = 57
a: \(x\in\left\{-4;-3;-2;-1;0;1;2;3;4\right\}\)
Tổng là 0
b: \(x\in\left\{-6;-5;-4;-3;-2;-1;0;1;2;3;4;5;6;7\right\}\)
Tổng là 7
a) x-45= -15+50
x-45= 35
x=35+45
x=80
b) 2x = -35+17
2x = -18
x = -9
c) -3 (x-4)=9-12
-3(x-4)= -3
x-4= 1
x=5
d) -36 - 4x +15 = 11
-36 - 4x = 11- 15
-36- 4x = -4
4x = -36 - (-4)
4x = -36+4 = -32
x = -32 : 4
x = -8
e) 125 - ( 3x - 20 ) = 115
3x - 20 = 125 - 115
3x -20 = 10
3x = 10+20= 30
x = 30: 3
x = 10
tick nhe ban oi
a/ (x-45) - 50 = -15
x - 45 = -15 + 50
x - 45 = 35
x = 35 + 45
x = 80
b/ 2x -17 = -35
2x = -35 + 17
2x = -18
x = -18 : 2
x = -9
a, 71 - ( 33 + x ) = 26
=> 33 + x = 71 - 26
=> 33 + x = 45
=> x = 45 - 33
=> x = 12
b, 140 : ( x - 8 ) = 7
=> x - 8 = 140 : 7
=> x - 8 = 20
=> x = 20 + 8
=> x = 28
c, 4 ( x + 41 ) = 22 . 102
=> 22 ( x + 41 ) = 202
=> x + 41 = 202 : 22
=> x + 41 = 102
=> x + 41 = 100
=> x = 100 - 41
=> x = 59
d, 11 ( x - 9 ) = 77
=> x - 9 = 77: 11
=> x - 9 = 7
=> x = 7 + 9
=> x 16
\(a.71-\left(33+x\right)=26\)
\(33+x=45\)
\(x=12\)
\(b.140:\left(x-8\right)=7\)
\(x-8=20\)
\(x=28\)
\(c.4\left(x+41\right)=2^2.10^2\)
\(4\left(x+41\right)=4.100\)
\(4\left(x+41\right)=400\)
\(x+41=100\)
\(x=59\)
\(d.11\left(x-9\right)=77\)
\(x-9=7\)
\(x=16\)