Question

 Решите уравнение:

x-2/5+2x-5/4+4x-1/20=4-x

Answer 1

$x-frac{2}{5}+2x-frac{5}{4}+4x - frac{1}{20}=4-x\ 8x=frac{2}{5}+frac{5}{4}+frac{1}{20}+4\ 8x=frac{8+25+1}{20}+4\ 8x=frac{34}{20}+4\ 8x=frac{114}{20}\ x=frac{114}{20*8}=frac{57}{80}$