If 5 7 3 and 20 30 10 follow the same logic then using the same logic what would come at 95 45 ?

Question

What would be the value of ? in the following grid -

5   7   3
20  10  30
95  45  ?

Answer 1

145

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a- b- c,
from first 2 sets we can assume that c=2a-b

5-7-3 2 * 5 - 7 = 3
20-30-10 2 * 20 - 30 = 10
95-45-x 2 * 95 - 45 = 145

Answer 2

2 X 5= 10- 7 = 3
2 X 20 =40- 30 = 10
2 X 95 =190- 45 = 145

Answer 3

5+2=7,5-2=3
20+10=30,20-10=10
95+(-40)=45,95-(-40)=135 ans..