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Answer
I sove it considering two cases:
1) (3-5x) is positive
=> 3-5x<7-8x
=> x<4/3
2) (3-5x) is negative
=> -(3-5x)<7-8x
=> x<10/13
overlapping both solution we get range of x is (-infinity,10/3)
If you find any error or need further clarification feel free to comment below
