book Maths Puzzle Numerical Ability

can you please really help me with this question.. it will really help me alot..
solve by any method.
-2x+10=0
2x-2y=6

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book Other Question

find four consecutive odd integers such that sum of the second integer and twice the fourth integer is 65 a to b is 10 miles further than b to c. b to c is 10 miles further than c to d. the distance from a to d is 390 miles..what is the distance from a to b?