Answer:
10 = 2y + 4
6 = 2y
y = 3
Step-by-step explanation:
18 = 10 + 2x
8 = 2x
x = 4
14: 2x-1 = 3
2x=4
x=2
15:
x = 1/2500000
16: (ln(4/3))/4
17: sqrt(5e^12)
18: x = 16, -4