Answer:
B. 89
Step-by-step explanation:
LOE + EOV = LOV,
becomes
[tex]7x+12+4x+9=142\\11x+21=142\\11x=121\\x = 11[/tex]
LOE = 7x + 12, so:
[tex]7 * 11 + 12\\77 + 12\\89[/tex]
