Các câu hỏi tương tự
Tim x biet
(x+1/5)-4=-2
(2x+3)*(x-7)=0
31/9(x)-5/2=8/3
Tim x,y,z biet:
(2|x|+5)/3=(3|y|-1)/5=(3-z)/7 va 2|x|+7|y|+3z=-14
1)tim x biet rang:
a)3^x-1=1/243
b)2^x+2^x+3=144
c)81^-2x.27x=9^5
2)tim tiep so ghang thu 5 cua day so sau:-1/a^2;2/a^3;-6/a^4;24/a^5;...
3)tim so tu nhien x biet :
a)4^x+4^x+3=4160
b)2^x-1+5.2^x-2=7/32
Tim x biet:
\(\frac{x+1}{18}+\frac{x+2}{17}=\frac{x+5}{14}+\frac{x+4}{15}\)
Tim x,y,z biet
2/x-1/+/2x+5/=\(\frac{14}{2+\left(3-2y\right)^{2020}}\)
tim x biet (2x-3)^2-4(x+1)^2=5
tim x y z biet x-1/2=y-2/3=z-3/4 biet x-2y+3z=14
tim x biet (2x-3)^2-4.(x+1)^2=5
tim y,x,z
x:y:z=3:8:5va 3x+ -2z=14
x/5=y/6,y/8=z/7va x+y-z=69
x-1/2=y+3/4=z-5/6va x+y-z
x/-3=y/7,y/-2=z/5va -2-44+5=146