Answer:
14
Step-by-step explanation:
2v - 7 = 9
Add 7 to both sides
2v = 16
Divide both sides by 2
v = 8
Plug it into 3v - 10
3v - 10 =
3(8) - 10 =
24 - 10 =
2v-7=9
2v=16
v=8
3(8)-10=14
