1) 2(х + 7) + 4х = 2х + 14 + 4х = 6х + 14 = 6 * 5 + 14 = 44
2) 9(3 - у) + 15 = 27 - 9у + 15 = 42 - 9у = 42 - 9*2 = 42 - 18 = 24
3) 1,5(у + 9) + 3,5 = 1,5у + 4,5 + 3,5 = 1,5у + 8 = 1,5*4 + 8 = 6 + 8 = 12
4) 3/4(х - 6) + 2 = 3/4х - 4 1/2 + 2 = 3/4х - 2 1/2 = 3/4*8 + 2 = 6 + 2 = 8