tim x biet |5-x|-17=13
a,Tim x biet:1+5+9+13+17+...+x=507528
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
tim x biet:
/x/+13=17
/x/+13=17
/x/=17-13
/x/=4
\(\Rightarrow\)x=4 hoặc (-4)
giup minh nha mai minh nop roi ^_^ ^_^
Ta có : 1 = 0 + 1 ; 5 = 2 + 3; 9 = 4 + 5;
13 = 6 +7 ; 17 = 8+ 9; ....
Do đó => x = a + (a+1) (a ∈∈N*)
=> 1 + 5 + 9+ 13 + 17 +....+ x = 4950
= 1 + 2+3+4+5+6+...+ a + (a+1) = 4950
Hay [(a+1)+1]×(a+1)2[(a+1)+1]×(a+1)2 = 4950
=> (a+1)(a+2) = 4950 .2 = 9900
=> (a+1)(a+2) = 99.100
=> a = 98
Do đó : x = a+ (a+1) = 98 + (98 + 1) = 197
tim x thuoc n biet : b,(149 nhan 35 : x + 5) nhan 17 =13 va d/(3 nhan x tru 3 ) binh phuong 3 =2 nhan 32 e/5 x+1-5x=500
tim x biet
3/(x+2).(x+5) + 5/(x+5).(x+10) + 7/(x+10).(x+17) = x/(x+2).(x+17)
Với x thuộc tập hợp A = -2;-5;-10;-17
Tim x biet -5.(13-x)=20
tim x biet 3(x-5)-2(2x-3)+ 3(6-x)=17
\(3\left(x-5\right)-2\left(2x-3\right)+3\left(6-x\right)=17\)
\(\Rightarrow3x-15-4x+6+18-3x=17\)
\(\Rightarrow-4x=8\)
\(\Rightarrow x=-2\)
Vậy x = -2
tim x biet 3(x-5)-2(2x-3) 3(6-x)=17