👤

(-4/7)+6/35+(-31/25)+8/20+1/25=??

Răspuns :

(-4/7)+6/35+(-31/25)+8/20+1/25=
=
-4/7+6/35-31/25+2/5+1/25=
=-4/7+6/35-6/5+2/5=
=-4/7+6/35-4/5=
=(-20+6-28)/35=
=-42/35=-6/5