\(8.2^{3x}.7^y=56^{2x}.5^{x-1}\)
\(2^3.2^{3x}.7^y=7^{2x}.8^{2x}.5^{x-1}\)
\(2^{3+3x}.7^y=7^{2x}.2^{6x}.5^{x-1}\)
\(7^{2x}:7^y=2^{6x}:2^{3+3x}.5^{x-1}\)
\(7^{2x-y}=2^{6x-3-3x}.5^{x-1}\)
\(7^{2x-y}=2^{3x-3}.5^{x-1}\)
\(7^{2x-y}=2^{3x}:8.5^x:5\)
\(7^{2x-y}=8^x.5^x:40\)
\(7^{2x-y}=40^x:40\)
\(7^{2x-y}=40^{x-1}\)
\(\Rightarrow x=y=1\)
tìm x,y biết : \(\frac{5x-1}{3}=\frac{7y-6}{5}=\frac{5x-7y-7}{4x}\)
Tìm x, y biết :
\(\frac{5x-1}{3}=\frac{7y-6}{5}=\frac{5x+7y}{4x}\)= 7
Tìm x,y biết 1+3y/12=1+5y/5x=1+7y/4x
Tìm x,y biết: 1+3y/12= 1+5y/5x = 1+ 7y/4x
1, Tìm x,y biết: 1+3y/12= 1+5y/5x = 1+ 7y/4x
Tìm x biết: (5x-1)/3=(7y-6)/5=5x+7y-7/4x.
Tìm cặp số x, y biết : 1+3y/12 = 1+5y/5x = 1+7y/4x
Tìm các cặp số (x;y) biết: 1+3y/12=1+5y/5x=1+7y/4x
Tìm cặp số x,y biết:
(1 + 3y)/12 = (1 + 5y)/5x = (1 + 7y)/4x
Tìm x, y biết 1+3y/12= 1+3y/5x= 1+7y/4x
