Question

Rozwiąż równania:
a)⅕(y-3)-⅔(y-⅗)+⅓=⅗-⅓(2y-3)
b)y-2/3+1/15-2y-5/3=8-4y/5
c)y-5/2+2y+3/5+⅓=y+7/15+y/2
Proszę o pomoc.
Z góry dziękuje:)

Answer 1

A)⅕(y-3)-⅔(y-⅗)+⅓=⅗-⅓(2y-3)
¹/₅y-³/₅-⅔y+²/₅+⅓=³/₅-⅔y+1_______/*15
3y-9-10y+6+5=9-10y+15
-7y+2=-10y+26_______/+10y
3y+2=26_________/-2
3y=24______/:3
y=8

b)y-2/3+1/15-2y-5/3=8-4y/5_________/*15
15y-10+1-30y-25=120-12y
-15y-34=120-12y__________/+12y
-3y-34=120________/+34
-3y=154_______/:(-3)
y=-154/3

c)y-5/2+2y+3/5+⅓=y+7/15+y/2_____/*30
30y-75+60y+18+10=30y+14+15y
90y-47=45y+14_________/-45y
45y-47=14_________/+47
45y=61________/:45
y=61/45