Answer:
v = 875
Explanation:
0.01v + 0.09(8000-v) = 650
Multiply the parenthesis
0.01v + 720 - .09v = 650
Combine like terms
720 - 0.08v = 650
Add 0.08v to both sides
720 = 650 + 0.08v
Subtract 650 from both sides
70 = 0.08v
Divide by 0.08 on both sides
v = 875
Hope this helps :)