1.

If x=7 and y=5 is the solution of 3x+ay=31. then the value of 'a' is ...... *

Answer»

Step-by-step EXPLANATION:

if x=7,y=5 PUT value in equation

3(7)+a(5)=31

=21+5a=31

=5a=31-21

=5a=10

=a =2



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