Tim x (7-x).(x+19)=0
tim x
x-20/7 + x-46/33 + x-5/8 + x+6/19 =0
tim x biet:a.2x^2-1=17/8;b.(2x-0,05)(x+3)>0;c.(7-x)(x+19)>0
Tim x
A, 6 x + x = 5^11 : 5^9 +3^1
B, 7 x - x = 5^21 : 5^19 + 3 . 2^2 -7^0
C, 7 x - 2x = 6^17 : 6^15 + 44 : 11
giup minh nhe . Thank you
tim x
a) ( x- 35 ) . 16 = 0
b) 19. ( x- 7 ) = 19
c) 37. x + 63 . x = 200
dau cham la thay cho dau nhan nha cac ban mong cac ban giai nhanh va chac dung thank cac ban rat nhiu
a, ( x - 35) . 16 =0
x - 35 = 0 : 16=0
x = 0 + 35
x = 35
b,19. (x - 7) = 19
x - 7=19 : 19=1
x =1 + 7
x =8
c,37.x + 63.x = 200
(37 + 63)x = 200
100.x=200
x =200 : 100
x = 2
Tim x
a) (x - 2) - (- 8) = - 137
b) 15 - ( - x + 18) = - 24
c) 12 - |x| = -19
d) 10 - |x + 3| = -4 - (- 10)
e) x .( x + 2) = 0
f) (x + 1) . ( x - 7)= 0
g) x2 + 2x = 0
h) ( 2x - 1) . ( x - 7 )= 0
h)\(\left(2x-1\right)\left(x-7\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}2x-1=0\\x-7=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=\frac{1}{2}\\x=7\end{cases}}\)
g) \(x^2+2x=0\)
\(\Leftrightarrow x\left(x+2\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x+2=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=0\\x=-2\end{cases}}\)
f) \(\left(x+1\right)\left(x-7\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x+1=0\\x-7=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=-1\\x=7\end{cases}}\)
tim giup mk vs nha dg can gap
(x-12) - (2x+31) = 6
2(x+7) - 3(x-2) = -2
(3x+19) (11-x) = 0
7x-x=521:519+3.22-70
giúp mình mình tick cho
tim x
7x-x=5^21:5^19+3.2^2-7^0
x.(7-1)=5^2+3.4-1
x.6=25+12-1
x.6=36
x=36:6
x=6
vậy x=6
k mk nha
Tim x
19+x / 116 - x =2/7
tim x
( -x2- 19 )(3-x) <0