А) 11/13x + 2/13x = 13/13 x = x
б) 7/8 а - 9/16 а = 5/16 а
в) 5 1/6 b + 2/3 b = 31/6 b +2/3 b = 35/6 b = 5 1/16 b
г) 7 3/4 y - 2 7/8 y = 31/4 y - 23/8 y = 39/8 y = 4 7/8 y
д) 2 1/2 х-( 1 1/4х - 1 1/5х) = 2 1/2 x - 1/20x = 49/20 x = 2 9/20 x
е) 3 4/5х - ( 2 3/4 х -1 1/5х) = 3 4/5х - 31/20 x = 55/20 x = 2 1/3 x
ж) 3 7/15х- ( 2 1/2х- 1 3/15х) = 3 7/15х- 39/30 х = 51/30 х = 1 21/30 х
з) 4 7/32х - (3 3/4х -1 7/32х) = 4 7/32х - 81/32 х = 54/32 х = 1 22/32 х