self Maths Puzzle

(17)3.5 x (17)? = 178

A. 2.29 B. 2.75
C. 4.25 D. 4.5

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self Other Question

W H Y
x N U T
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Z Z N P
Z Y P Y
Z U H A
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Z N E P Z P
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Each letter represents one and only one digit from 0 to 9.
Find the solution.
If a x - 1 = b x - 3 , then the value of x is:
b a

A.
1
2
B. 1
C. 2 D.
7
2