Tìm x, biết:
a) x-(-25+x)=13-x
b) 15-(30+x)=x-(27-l-8l)
c) (12x-43).83=4.84
bài 2 tìm x biết
a)128-3(x+4)=23 d)720:[41-(2x-5)]=23.5
b)[(4x+28).3+55]:5 =35 e)123-5.(x+4)=38
c)(12x-43).83=4.84 g)(3x-24).73=2.74
nhớ giúp nhaaaaa
a)128-3(x+4)=23
125.(x+4)=23
( x +4)=23 : 125
x+4 = 0,184
x = 0,184 -4
x = -3 .816
theo mềnh nhóe ( làm từng câu )
c: =>12x-64=32
=>12x=96
hay x=8
g: =>3x-16=14
hay x=10
e: =>5(x+4)=85
=>x+4=17
hay x=13
a)25-(25-x)=12+(42-65)
b)31-(17+x)=18
c)5+l x+3 l = 9
d)x-(25+x)=13-x
e)15-(30+x)=x-(27-l-8l)
f)[(10-x).2+51]:3-2=3
g)(x-12)-15=20-(17+x)
h)-12-l13-xl=-21
i)8<lx-6l<9
mọi người giúp mk với, mk đang cần gấp
1,Tính giá trị biểu thức
a, 13 . 17 - 256 : 16 + 14 : 7 - 1
b, 15 . 24 - 14 . 5 . (145 : 5 - 27)
c, 15 . 8 - (17 - 30 + 83) - 144 : 6
d,18 - 4 . (27 - 90 + 73) : 10
2,Tìm x
a, 315 - (135 - x)=215
b, x - 320 : 32 = 25 . 16
c, 3 . x - 2018 : 2 = 23
d, 280 - 9 . x - x = 80
e, 38 . x - 12 . x - x . 16 = 40
Giúp mình với nhé,mình đang cần gấp !!
2,
a) \(315-\left(135-x\right)=215\)
\(\Rightarrow135-x=315-215\)
\(\Rightarrow135-x=100\)
\(\Rightarrow x=135-100\)
\(\Rightarrow x=35\)
b) \(x-320:32=25\cdot16\)
\(\Rightarrow x-10=5^2\cdot4^2\)
\(\Rightarrow x-10=20^2\)
\(\Rightarrow x-10=400\)
\(\Rightarrow x=410\)
c) \(3\cdot x-2018:2=23\)
\(=3\cdot x-1009=23\)
\(\Rightarrow3\cdot x=1032\)
\(\Rightarrow x=1032:3\)
\(\Rightarrow x=344\)
d) \(280-9\cdot x-x=80\)
\(\Rightarrow280-x\cdot\left(9+1\right)=80\)
\(\Rightarrow280-10\cdot x=80\)
\(\Rightarrow10\cdot x=280-80\)
\(\Rightarrow10\cdot x=200\)
\(\Rightarrow x=20\)
e) \(38\cdot x-12\cdot x-x\cdot16=40\)
\(\Rightarrow x\cdot\left(38-12-16\right)=40\)
\(\Rightarrow x\cdot10=40\)
\(\Rightarrow x=40:10\)
\(\Rightarrow x=4\)
Tìm x, biết:
a ) | x | − 7 6 = 4 15 ; b ) x − 4 3 = 1 6
c ) x − 4 3 − 1 3 = 1 2 ; d ) 8 3 − 7 9 − x = − 1 5
e ) x − 1 4 2 − 25 64 = 0 f ) x − 1 4 2 + 17 64 = 21 32
a ) x = 43 30 x = − 43 30 ; b ) x = 3 2 x = 7 6 . c ) x = 13 6 x = 1 2
d ) x = − 94 45 x = 164 45 ; e ) x = 7 8 x = − 3 8 . f ) x = 7 8 x = − 3 8
Tìm x, biết:
a) x − 4 3 − 1 3 = 1 2
b) 8 3 − 7 9 − x = − 1 5
a) x = 13 6 x = 1 2
b) x = − 94 45 x = 164 45
Tìm x biết
a, 25+( 15-x) =30
b, 43-(24-x) =20
c, 2.( x - 5) - 17 =25
d, 3.( x+ 7 ) -15 = 27
a)25+(`15-x)=30
15-x=25-30
x=15-5
x=10
b)43-(24-x)=20
24-x=43-20
x=24-23
x=1
c)2.(x-50-17=25
2.(x-5)=25+17
x-5=42:2
x=21+5
x=26
d)3.(x+7)-15=27
3.(x+7)=15+27
x+7=42:3
x=14-7
x=7
Tìm số nguyên x biết:
a) 22 + (2x - 13) = 83;
b) 51 - ( -12 + 3x) = 27;
c) - (2x + 2) + 21 = - 23;
d) 25 - ( 25 - x) = 0.
a) 22 + (2x -13) = 83 => 2x -13 = 61 => x = 37.
b) 51 - (-12 + 3x) = 27 => 63 - 3x = 27 => x = 12.
c) - (2x + 2) + 21 = - 23 => 2x + 2 = 44 => x = 21.
d) 25 - (25 - x) = 0 => 25 - 25 + x = 0 => x = 0.
Tìm số nguyên x biết: a) 22 + (2x - 13) = 83; b) 51 - ( -12 + 3x) = 27 c) - (2x + 2) + 21 = - 23; d) 25 - ( 25 - x) = 0
tìm x biết,
a)x-13=-5+8
b)|x-2|=|-5|
c)25-(30+x)=x-(27-8)
d)(x-12)-15=(20-7)-(18+x)
a)x-13=-5+8
x-13=3
x=3+13
x=16 hoặc -10
b)|x-2|=|-5|
|x-2|=5|
|x|=5+2
|x|=7
x=7 hoặc -7
c)25-(30+x)=x-(27-8)
25-(30+x)=x-19
...còn lại mình bó tay
d)bó tay luôn