Answer:
15y : 15 x 3 = 45
xy : 2 x 3 = 6
y + 23 : 23 + 3 = 26
5x + 9 : 5 x 2 = 10 + 9 = 19
6x - 2 : 6 x 2 = 12 - 4 = 8
yz : 3 x 4 = 12
y + 12 : 3 + 12 = 15
2z - 7 : 2 x 4 = 8 - 7 = 1
9x + y : 9 x 2 = 18 + 3 = 21
6x + 12 : 12 + 12 = 24
xz + 4 : 2 x 4 = 8 + 4 = 12
5x + 6z = 10 - 24 = -14
Step-by-step explanation:
