=> (2x+1)3=100+25
=> (2x+1)3=125
=> (2x+1)3=53
=> 2x+1=5
=> 2x=5-1
=> 2x=4
=> x=4:2
=> x=2
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B1:tim cac so nguyenx,y biet:
X,y + 2.x- 3y= 11
B2 tim x biet
A -15.(x+2)+7.(2x-3)=(-5) . (+10)
Giai gap minh nhe
Tim x biet.
a/x+5+x-7+x-9=x-5+x-2
b/9(2x-3)+5=4(4-1)-8
c/2=-(×-1)^5+34
d/7=-|x-5|+10
tim x biet : a,-12/21×x + 3/7=-4/3, b, 2x +-3^2=5/4 , c, 75% x- 2/5=3/10, d, (3x-2)×(x+7)
tim 2 so tu nhien x va y biet 1) (2x+1)x(y-3)=10 2) (x+1)x(2y-5)=143 3) (3x-2)x(2y-3)=1 4) (x+1)x(2y-1)=12
tim 2 so tu nhien x va y biet (2x+1)x(y-3)=10
tim x biet:
a)|x|=5
b)|x|+3=7
c)\x|-2=3
d)|2x-4|+7=10
tim cac so nguyen x biet
a) (2x - 10 )(x + 3)=0
b)(x+ 5)(x2 - 9)=0
Tim x, biet:
a) (-5)-(x+5)=3-(2x-5)
b)2(x-3)-3(x-2)=3(x+1)-5(x-2)
C)4(1-2x)=(-3)-3(2+3x)
Giải ngay nhé, chiều mình đi học rồi.
tim cac sn x biet :
|x+1| = 2^3 -1
|2-x|=5
-2. (x+6)+6.(x-10)=8
-4 . (2x+9)-(-8x+3)- (x+13) = 0
cac ban giai dung va chi tiet nha trong toi nay