Question

aflati x din egalitatea;    2 ·5²-5 · [ 3²+5-3·(2x-2004⁰)]=5²

Answer 1

$2*25-5[9+5*(2x-1)]=25$
$50-5(9+10x-5)=25$
$50-5(4+10x)=25$
$50-20-50x=25$
$30-50x=25$
$-50x=25-30$
$-50x=-5 |*(-1)$
$50x=5$
$x= \frac{5}{50} = \frac{1}{10}=0,1$