7а-4/5b при a=3, b= -2
7*3 - 4/5 * (-2) = 21 + 8/5= 22 3/5
x+y/15+2 при x= -4, y=5
-4 + 5/15 + 2= -60/15 + 5/15 + 30/15 = -25/15 = -5/3 = -1 2/3
7а-4/5b при a=3, b= -2
7*3 - 4/5 * (-2) = 21 + 8/5= 22 3/5
x+y/15+2 при x= -4, y=5
-4 + 5/15 + 2= -60/15 + 5/15 + 30/15 = -25/15 = -5/3 = -1 2/3