67,5 : x = 60 : (x+6)
źródło:
\frac{67,5}{x} = \frac{60}{x+6}
x= [ 67,5 * ( x + 6 ) ] : 60 x=( 67,5x+ 405 ) : 60 x=1,125x + 6,75 -0,125x = 6,75 x=-54
\frac{67,5}{x}=\frac{60}{x+6}
\frac{67,5}{x}=\frac{60}{x+6} |*x
67,5=\frac{60x}{x+6} | *(x+6)
67,5(x+6)=60x
67,5x+405=60x
67,5x-60x=-405
7,5x=-405
x=\frac{-405}{7,5}
x=-54