Question

dind the value of a and b......

Answer 1

ax + by=7
putting value of A (3,5)
3a+5b=7
now putting value if B (1,4)
a+4b=7
now subtracting eq1 from 2nd
and by elimination method
multiply eq 2nd by 3
so..
3a+12b=21
now subtract ..
and
b=2
and a= -1
hope it helps u...