tim x ,5x-x=4088
2x+3.(x+5)=2505
5x-4(1+x)=4088
tìm x
tìm stn x :
a,2x + 3x = 1505
b,5x - x = 4088
a/ 2x + 3x = 1505
\(\Rightarrow\)5x = 1505
\(\Rightarrow\)x = 1505 : 5 = 301
Vậy x = 301
b/ 5x - x = 4088
\(\Rightarrow\)4x = 4088
\(\Rightarrow\)x = 4088 : 4 = 1022
Vậy x = 1022
a) 2x + 3x = 1505
=> 5x = 1505
x = 1505 : 5
x = 301
b) 5x - x = 4088
=> 4x = 4088
x = 4088 : 4
x = 1022
2x+3x=1505 ; 5x-x=4088
a ) \(2x+3x=1505=x\left(2+3\right)=1505=>5x=1505\)
\(=>x=301\)
b ) \(5x-x=4088=>x\left(5-1\right)=4088\)
\(=>4x=4088=>x=1022\)
a) 2x + 3x = 1505
x ( 2 + 3 ) = 1505
x . 5 = 1505
x = 1505 : 5
x = 301
b) 5x - x = 4088
5x - 1x = 4088
( 5 - 1 ) x = 4088
4x = 4088
x = 4088 : 4
x = 1022
2x+3x=1505
5x =1505
x =1505:5
x =301
Vậy x=301
5x-x=4088
4x =4088
x =4088:4
x =1022
Vậy x=1022
Tìm x:
a) 2x + 3x = 1505
b) 5x - x =4088
Giải giúp mình nha. Cảm ơn nhiều !
a)\(2x+3x=1505\)
=>\(x\left(2+3\right)=1505\)
=>x.5=1505
=>x=1505:5
=>x=301
b)\(5x-x=4088\)
=>x(5-1)=4088
=>x.4=4088
=>x=4088:4
=>x=1022
a) 2x + 3x = 1505
(2 + 3)x = 1505
5x = 1505
x = 1505 : 5
x = 301
b) 5x - x = 4088
5x - 1x = 4088
(5 - 1)x = 4088
4x = 4088
x = 4088 : 4
x = 1022
a) 2x + 3x = 1505
(2 + 3) x = 1505
5x = 1505
x = 1505 : 5
x = 301
b) 5x - x = 4088
(5 - 1) x = 4088
4x = 4088
x = 4088 : 4
x = 1022
tìm x
5x -x =4088 + (5 ^7 + 5^9 ) . (6 ^8 + 6^10 ) . (2^4-4^2)
3 ^2 . ( 15 - 2x )- 5 ^2 = 5 . 2 ^2
152 - ( 2x-1)^3 = 3^0.3^1.3^2
AI NHANH MÌNH TICK NHA
Bài 1 Tìm x biết
\(a) 2x+15=27\)
\(b)8x-4x=1208\)
\(c)75883-(31200+x)=999\)
\(d)2x+3x=1505\)
\(e) 5x-x=4088\)
Giúp mình nha, ai nhanh và đúng mình sẽ tick
\(a,2x+15=27\)
\(\Rightarrow2x=27-15\)
\(\Rightarrow2x=12\)
\(\Rightarrow x=12\div2\)
\(\Rightarrow x=6\)
a)2x+15=27
=> 2x= 27-15=12
=>x=6
b) 8x-4x = 1208
=> 4x =1208
=>x=302
c) 75883 -(31200+x) =999
=> 75883-31200-999=-x
=>x=-43684
d)2x+3x=1505
=>5x=1505
=>x=301
e)5x-x=4088
=> 4x=4088
=>x=1022
a) 2x +15=27
2x = 27-15
2x = 12
x = 12:6
x= 6
b) 8 x - 4x = 1208
4x = 1208
x = 1208 : 4
x = 302
c) 75833 - ( 31200 +x)=999
31200 +x= 75883-999
31200+x=74884
x=74884-31200
x=43684
d) 2x +3x=1505
5x = 1505
x = 1505:5
x =301
5x - x =4088
4x = 4088
x = 4088 : 4
x = 1022
Tìm số tự nhiên x biết:
(x-289).47=0
54. (84-x)=54
7.x-10=704
928-(31+x)=128
2.x+3.x=1505
5.x-x=4088
ai nhanh minh tick cho
a)x-289=0 d)31+x=928-128
x =0+289 x=800-31
x =289 x=769
Vây x=289 Vậy x=769
b)84-x=54:54 e)5x=1505
84-x=1 x=301
x=84-1 Vậy x=301
x=83 f)4.x=4088
Vậy x=83 x=1022
c)7.x=704+10 Vậy x=1022
x=714:7 nha!
x=102
Vậy x=102
(x-289).47=0
x-289=0:47
x-289=0
\(\Rightarrow\)x=0+289
Vậy x=289
54.(84-x)=54
84-x=54:54
84-x=1
\(\Rightarrow\)x=84-1
Vậy x=83
7.x-10=704
7.x=704+10
7.x=714
\(\Rightarrow\)x=714:7
Vậy x=102
928-(31+x)=128
31+x=928-128
31+x=800
\(\Rightarrow\)x= 800-31
Vậy x=769
2.x+3.x=1505
(2+3).x=1505
5.x=1505
\(\Rightarrow\)x=1505:5
Vậy x= 301
5.x-x=4088
(5-1).x=4088
4.x=4088
x=4088:4
Vậy x= 1022
a)(x-289).47=0
=>x-289=0
=>x=289
b)54. (84-x)=54
=>84-x=1
=>x=83
c)7.x-10=704
=>7*x=714
=>x=102
d)928-(31+x)=128
=>31+x=800
=>x=769
e)2.x+3.x=1505
=>x(2+3)=1505
=>x*5=1505
=>x=301
g)5.x-x=4088
=>x(5-1)=4088
=>x*4=4088
=>x=1022
Tim x biet:|x2 -5x +4| = 5x-x-4
\(|x^2-5x+4|=4x-4\)
\(\Rightarrow|\left(x-1\right)\left(x-4\right)|=4\left(x-1\right)\)
\(\Rightarrow\orbr{\begin{cases}\left(x-1\right)\left(x-4\right)=4\left(x-1\right)\\\left(x-1\right)\left(x-4\right)=-4\left(x-1\right)\end{cases}}\)
TH1 :
\(\left(x-1\right)\left(x-4\right)=4\left(x-1\right)\)
\(\Rightarrow\left(x-1\right)\left(x-4\right)-4\left(x-1\right)=0\)
\(\Rightarrow\left(x-1\right)\left(x-8\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x=1\\x=8\end{cases}}\)
Th2:
\(\left(x-1\right)\left(x-4\right)=-4\left(x-1\right)\)
\(\Rightarrow\left(x-1\right)\left(x-4\right)+4\left(x-1\right)=0\)
\(\Rightarrow\left(x-1\right)x=0\)
\(\Rightarrow\orbr{\begin{cases}x=1\\x=0\end{cases}}\)
\(\Rightarrow S=\left\{0;1;8\right\}\)
Bài 7. Cho hai đa thức: P(x) = 5x- 3x+7-x và Q(x) =-5x +2x-3+2x-x-2
b) Tim đa thúc M(x) = P(x) + Q(x). a) Thu gọn hai đa thức P(x) và Q(x)
c) Tim x để P(x)=-Q(x)
ab, \(M\left(x\right)=x+7-2x-5=-x+2\)
c, \(x+7=-\left(-2x-5\right)\Leftrightarrow x+7=2x+5\Leftrightarrow x=2\)