a) (2x - 3)(y + 4) = -12 = -1.12 = -3.4 = -4.3 = -12.1 = -2.6 = -6.2
Th1: 2x - 3 = -1 => x = 1
y + 4 = 12 => y = 8
..............................
tim x,y
a)(2x-3).(y+4)=(-12)
b)(x-1).(y+5)=9
1)a)2x-13=25+6x
b)12-x=3x+6
c)40-(25-2x)=x
d)|x-3|=5
e)|x-3|+(x+2)+(x+1)=12
2)tính
a)(-1).(-2).(-3).(-4).(-5).[(-3)-(-5)]
b)1-2+3-4+5-6+...-98+99
3)tim x
a)(x-1).(y-2)=5
b)x.(y-3)=12
Giúp tớ một số bài tim x, tớ tick cho
a)x.y=12
b)(x-1)(y+2)=7
c)x.(y-3)=17
d)(2x+1).(y-3)=12
e)x+y=72 và ƯCLN(x,y)=9
h)x.y=300 và ƯCLN(x,y)=5
tim x
a; 4 | 3x - 1 | + | x | - 2 | x-5 | + 7 | x - 3 | = 12
b; 3 |x+4|-|2x+1|-5|x+3|+|x-9|=5
Tìm x,y,z nguyên biết
1) x/5 = -12/10
2) (x + 1)/2 = x/3
3) (1 - 2x)/9 = 1/ (1- 2x)
4) 4/5 = 12/x = y/20 = 8.(y -x)/z
x+1/2=x/3
1-2x/9=1/1-2x
4/5=12/x=y/20=8(y-x)/z
x+1/2=x/3
1-2x/9=1/1-2x
4/5=12/x=y/20=8(y-z)/x
Bài 1 : Tìm x,yez
1, 3 - | 2x + 1 | = ( - 5 )
2, 12 + | 3 - x | = 9
3 , | x + 9 | = 12 + ( - 9 ) + 2
4 , 5x - 16 = 40 + x
5 , 5x - 7 = - 21 - 2x
6, ( 2x - 1 ) ( y - 2 ) = 12
nhờ cấc a/c giúp e vs ạk e đang cần gấp
6, ( 2x + 1 ) ( y - 2 ) = 12
TÌM Y BIẾT:
a) y x 4/3= 16/9
b) (y-1/2)+0,5=3/4
c) 4/5-2/5 x y=0,2
d) (y+3/4)x5/7=10/9
e) y : 5/4=9/5+1/2
f) y x 1/2+3/2x y=4/5