7by+4b-14y-8,если y=5/28 ,b=2/7

Question

7by+4b-14y-8,если y=5/28 ,b=2/7

Answer 1

7*(2/7)*(5/28)+4*(2/7)-14*(5/28)-8=5/14+8/7-5/2-8=(5+16-35)/14-8=-1-8=-9

Answer 2

7by+4b-14y-8 = 7( 2/7 * 5/28) + 4 * 2/7 -(14 * 5/28) - 8 = 7* 5/98 + 1 1/7 - 2 1/2  -8 = 5/14 + 8/7 - 5/2 -8 = 5/14 + 16/14 - 35/14 -8 = 21/14 - 35/14 -8 = -14/14 -8 = - 9