Answer:
9000
Step-by-step explanation:
67.50 x 2 x 12 = 1620 (deduction for the whole yr)
1620 / 18 x 100 = 9000
2x+4=10
2x=6
x=3
2(3)+4= 10
(plus, on parallelograms like that, parallel sides are equal to each other)
The answer is 1:6.
I wrote down the solution in the picture.