Question 1195568
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(A)  To answer question (A), substitute x=1 and y=4 in expression 3x+4y; 
     then calculate the value and compare it with 19.


(B)  To answer question (B), substitute x=1 and y=4 in expression 7x-2y; 
     then calculate the value and compare it with -1.
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At this point, you are just instructed what to do.



Is everything clear to you ?