a)½ y+3=7 1/2y=7-3 1/2y=4/:1/2 y=4*2=8 b) ⅗ y + ⅖ =4 3/5y=4-2/5 3/5y=20/5-2/5 3/5y=18/5/:3/5 y=18/5*5/3 y=6 c)3(y+2)=5 3y+6=5 3y=5-6 3y=-1/:3 y=-1/3 )7(y +3)=5y +2+2y 7y+21=7y+2 7y-7y=2-21 0=-19
a)½ y+3=7 | x 2 y + 3 = 7 | - 3 y = 4 b) ⅗ y + ⅖ =4 | x 5 3y + 2 = 4 | - 2 3y = 2 | : 3 y = 2/3 c)3(y+2)=5 3y + 6 = 5 | - 6 3y = -1 | : 3 y = - 1/3 d)7(y +3)=5y +2+2y 7y + 21 = 7y + 2 | - 7y 21 = 2 równanie nie prawdziwe! e)y/2 + ⅓ = 7/6 | x6 3y + 2 = 7 | -2 3y = 5 | :3 y = 3/5 g) ⅕(y-3)-⅔(y-⅗)+⅓=⅖-⅓(2y-3) | x15 3(y - 3) - 10(y - 3/5) + 5 = 5 (2y - 3) 3y - 9 - 10y + 6 + 5 = 10y - 15 3y - 10y - 10y = -15 + 9 - 6 - 5 -17y = - 17 | :(-17) y = 1
a)½ y+3=7 1/2y=7-3 1/2y=4|:1/2 y=8 b) ⅗ y + ⅖ =4 3/5y=4-2/5 3/5y=18/5|:3/5 y=6 c)3(y+2)=5 3y+6=5 3y=5-6 3y=-1|:3 y=-1/3 d)7(y +3)=5y +2+2y 7y+21=5y+2+2y 7y-5y-2y=2-21 0=-19 sprzeczność e)y/2+ ⅓ = 7/6|*6 3y+2=7 3y=7-2 3y=5|:3 y=1i2/3 g(⅕(y-3)-⅔(y-⅗)+⅓=⅖-⅓(2y-3) 1/5y-3/5-2/3y+6/15+1/3=2/5-2/3y+1 1/5y-2/3y+2/3y=2/5+1+3/5-6/15-1/3 1/5y=2-11/15 1/5y=19/15|:1/5 y=6i5/15
