А 12 = -5,5+4,1*12 = 43,7
У(-2) = 2 * 4 + 2 - 1 = 9
у(-1) = 2 * 1 + 1 - 1 = 2
у(0) = 2 * 0 - 0 - 1 = -1
у(1,5) = 2 * 2,25 - 1,5 - 1= 2
у(2) = 2 * 4 - 2 - 1 = 5
0,5х + 2/3(х + 4) = 12
1/2х + 2/3х + 8/3 = 12 Общий знаменатель 6
3х + 4х + 16 = 72
7х = 72 - 16
7х = 56
х = 8