oblicz i sprawd a)17y+28=19y+27 B)8k-19=-8k+19

a) 17y+28=19y+27 1=2y ||:2 0,5=y spr. 17*0,5+28=19*0,5+27= =8,5+28=9,5+27= =36,5=36,5 b)8k-19=-8k+19 16k=38 ||:16 k=2,375 spr. 8*2,375-19=-8*2,375+19= =19-19=-19+19= =0=0

a) 17y+28 = 19y+27 17y - 19y = 27 - 28 -2y = -1 /:(-2) y = ½ Spr. L = 17*½ + 28 = 17/2 +28 = 8½ + 28 = 36½ P = 19*½ + 27 = 19/2 + 27 = 9½ + 27 = 36½ L = P b) 8k-19 = -8k+19 8k + 8k = 19 + 19 16k = 38 /:16 k = 38/16 k = 2 [6/16] k = 2⅜ Spr. L = 8*2⅜ - 19 = 8*19/8 - 19 = 19 - 19 = 0 P = -8*2⅜ + 19 = -8*19/8 + 19 = -19 + 19 = 0