a/ 3^x+3.3^x=2.3^5 ( QUY ĐỒNG)
4.3^x=2.3^5=> 3^x=3^5/2 lớp 7 đề ko phù hợp
B. (16/32)^X=1024=2^10
2^(-x)=2^10=> x=-10
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a/ 3^x+3.3^x=2.3^5 ( QUY ĐỒNG)
4.3^x=2.3^5=> 3^x=3^5/2 lớp 7 đề ko phù hợp
B. (16/32)^X=1024=2^10
2^(-x)=2^10=> x=-10
Tìm x,y biết
1. \(\frac{x}{3}=\frac{y}{2}\)và 2x+5y=32
2.\(\frac{x}{3}=\frac{y}{16}\)và 3x-y=35
3.3x=5y và x+y=30
tim x
\(\frac{3x+2}{5x+7}=\frac{3x-1}{5x+1}\)
\(\frac{x+1}{2x+1}=\frac{0.5x+2}{x+3}\)
tim x biet
a;\(\frac{3x+2}{5x+7}=\frac{3x-1}{5x+1}\)
b; \(\frac{x+1}{2x+1}=\frac{0,5x+2}{x+3}\)
Tim x,y,z:
\(\frac{x-1}{2}\)=\(\frac{y-2}{3}\)=\(\frac{z-3}{4}\)va 2x+3y-z=503x=2y ; 7y=5z va x-y+z=32
tim x
\(\frac{3x-1}{4}\)-\(\frac{1}{2}\)=\(\frac{x}{3}\)
|4x-3|=x-1
Tim x:
\(\frac{3x-1}{2x+1}=\frac{3}{7}\)
Tim x, y:
\(\frac{3x-2}{7}=\frac{5y-3}{11}=\frac{3x-5y+1}{4x}\)
Tim x , biet:\(\frac{^{x^2}}{x-2}=\frac{3x+1}{3}\)
tim x thoa man dang thuc |x+1|+|2x+3|+|3x+5|=16x-1
Giúp mk vs nhé!!!