\(a,23-x=19-\left(-21\right)\)
\(23-x=19+21\)
\(23-x=40\)
\(x=23-40\)
\(x=-17\)
Vậy \(x\in\left\{-17\right\}\)
\(b,x-7=\left(-2\right)-8\)
\(x-7=\left(-2\right)+\left(-8\right)\)
\(x-7=-10\)
\(x=-10+7\)
\(x=-10-\left(-7\right)\)
\(x=-3\)
Vậy \(x\in\left\{-3\right\}\)
a)23-x=19-(-12)
=>23-x=31
x=23-31
x=-8
Vậy x=-8
b)x-7=(-2)-8
x-7=-10
x =(-10)+7
x =-3
Vậy x=-3
a,23-x=19-(-12)
23-x=31
x=23-31
x=-8
b,x-7=(-2)-8
x-7=-10
x =-10+7
x =-3
Nếu đúng k mình nha
tim x biet:a.2x^2-1=17/8;b.(2x-0,05)(x+3)>0;c.(7-x)(x+19)>0
tim x nguyen biet:
a 8.(x mu 2 +3).(5-x)
b)(2x + 1)mu 2=25
c) (1-3x)mu3 =64
d)(4-x)mu3 =-27
e) xmu2 -5x =0
tim so nguyen x biet:a,(x2+8).(x2-9) = 0 b, (x2-5).(x2-25)<0 c,(x-3).(x+7)<0
Tim cac so nguyen x,y biet:a)*x2 -3*x+1 chia het cho x+2 b)x2-xy = 5x-4y-9 c) (x2-8)*(x2-15)<0 d) (x+1)2+(y+1)2+(x-y)2=2 e) (x2-4)x2>0 ai lam truoc minh tick,mai minh di hoc rui,lam giup minh di pls Thank ban truoc ne ;(
bai 1 tim cac so nguyen x,y biet
a,x/3=7/y b,x/y=-3/11 c,x/y-1=5/-19
bai 2 tim cac so nguyen x,y,z,t biet
12/-6=x/5=-y/3=z/-17=-t/-9
Cau 3 (2 diem). Tim so tu nhien x, biet:
a. 123 - x =38
b. (x+15) - 7 =33
c. 3x+3 - 13=230
tim so nguyen x, biet
a. 7 - x = 8 - ( -7 )
b. x - 8 = ( -3 ) = -8
tim so nguyen a, biet
a. gia tri tuyet doi a gia tri tuyet doi = 2
b. gia tri tuyet doi a + 2 gia tri tuyet doi = 0
tim cac so nguyen x,y,z biet :-6/12=x/8=-7/y=z/-18
TIM SO NGUYEN x , BIET :
a) 3636 : ( 12x - 91) = 36 b) ( x : 23 + 45 ) . 67 = 8911
c) ( 19x + 2.52 ) : 14 = ( 13 - 8 ) 2 - 4 d) -12 . ( x- 5 ) + 7(3 -x ) = 5
