tim x biet x+8=9
tim so nguyen x biet x+5-6+8-9+3-5+9-10=9
tim x biet 55/8 <x <64/9
quy đồng 55/8=495/72
64/9=512/72
các số trên là 496,497,498,...,511
tim so tu nhien x biet 55/8<x<64/9
Ta có:
\(\frac{55}{8}=6\frac{7}{8}\) < x < \(\frac{64}{9}=7\frac{1}{9}\)
=> 6 < \(6\frac{7}{8}\) < x = 7 < \(7\frac{1}{9}\)
Vậy x = 7.
Ta có : \(\frac{55}{8}=6\frac{7}{8}\); \(\frac{64}{9}=7\frac{1}{9}\) => x = 7
tim so tu nhien x biet 55/8 < x < 64/9
Tìm số tự nhiên x biết 55/8 < x < 64/9
bai 1)tim x biet
a )24-(36+5)=x
b)14-21=(13-x)-(15+8)
bai 2) tim x biet
a)17-x=-25+(-16+9)
b)3x-21=-19-(-2x)
Bài 1: Tìm x, biết
a )24-(36+5)=x b)14-21=(13-x)-(15+8)
24-41=x (13-x)-23=-7
x=-17 13-x=(-7)+23
Vậy x=-17 13-x=16
x=13-16
x=-3 Vậy x=-3
Bài 2:Tìm x, biết
a)17-x=-25+(-16+9) b)3x-21=-19-(-2x)
17-x=-25+(-7) 3x-21=-19+2x
17-x=-32 3x-2x=-19+21
x=17-(-32) x=4
x=49 Vậy x=4
Vậy x=49
Bài 1:
a. 24 - (36+5) = x
=> 24 - 41 = x
=> -17 = x
=> x = -17
b. 14 - 21 = (13 - x) - (15 + 8)
=> -7 = 13 - x - 23
=> -7 - 13 + 23 = -x
=> 3 = -x
=> x = -3
Bài 2:
a. 17 - x = -25 + (-16 + 9)
=> 17 - x = -25 + (-7)
=> 17 - x = -32
=> 17 + 32 = x
=> x = 49
b. 3x - 21 = -19 - (-2x)
=> 3x - 21 = -19 + 2x
=> 3x - 2x = -19 + 21
=> x = 2
Bài1
a)24-(36+5)=x\(\Rightarrow\)x=24-41=-17
b)14-21=(13-x)-(15+8)\(\Rightarrow\)(13-x)-(15+8)=-7\(\Rightarrow\)13-x=-7+23=16\(\Rightarrow\)x=13-16=-3
Bài2
a)17-x=-25+(-16+9)\(\Rightarrow\)17-x=-25+-7\(\Rightarrow\)17-x=-32\(\Rightarrow\)x=17-(-32)=17+32=49
b)3x-21=-19-(-2x)\(\Rightarrow\)3x-(-2x)=-19-21\(\Rightarrow\)3x+2x=-40\(\Rightarrow\)5x=-40\(\Rightarrow\)x=-8
a, Cho F(x) = a x+b . Tim a,b biet f(0) = 3 va F(2) =-1
b, Cho F(x) =a x+ b. Tim a,b biet F(1) = -1 va F(-2) = 8
c, Cho F(x) =a x +b .tim a,b biet F(0) = 1 va F(-2) = -9
Tim x biet :
a,12-91+1/5-9/8.x=30
b,45+8-64.x=73
tim x thuoc z biet
x - 9 = (-5) . 8
\(x-9=\left(-5\right)\cdot8\)
\(x-9=-40\)
\(x=-40+9\)
\(x=-31\)
=> x - 9 = (-40)
=> x = (-40) + 9
=> x = -31
Vậy x= -31
tim so tu nhien x biet:7/9+16/48<x<43/8+0.125
ta có: 10/9 < x < 11/2
=> 1 < x < = 5
=> x = {2;3;4;5}
\(\frac{7}{9}+\frac{16}{48}< x< \frac{43}{8}+0.125\)
\(\frac{10}{9}< x< \frac{11}{2}\)
\(1.11< x< 5.5\)
Vậy \(x=2;3;4;5.\)
Ta có:7/9+16/48=7/9+1/3=10/9
43/8+0.125=43/8+1/8=11/2
=>10/9<x<11/2
=>9/9<10/9<x<11/2<12/2
=>1<x<6
Vì x là số tự nhiên nên x=2,3,4,5
Vậy x=2,3,4,5.