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Given, 5*x +9*y= 141
So, LCM (5,9) = 45 and 141/45~ So, we will have 3 to 4 solutions of the equation.

Trail and error= (x,y) = (3,14), then the other solutions by compensating x and y coefficient (12,9) or (21,4)

So, We have 3 solutions. I think C. :)
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5x+9y=141.
5x=141-9y

This is a multiple of 5 if last digit is either 0 or 5.

Only option is 141- x1 or 141 -x6

=> 9x9 gives 81 , 9x4 & 9x14 gives 6 as last digit,

Hence 3 values

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