f m and n are two positive integers then what is the value of mn? (1)7m + 5n= 29 (2) m + n= 5
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7m+5n=29 ---equation 1
m+n=5
m=5-n
value m put equation 1
7(5-n)+5n=29
35-7n+5n=29
35-2n=29
35-29=2n
6=2n
n=6/2
n=3
n value put into equation 2
m+n=5
m+3=5
m=5-3
m=2
value of m& n put in mn
2*3=6
m+n=5
m=5-n
value m put equation 1
7(5-n)+5n=29
35-7n+5n=29
35-2n=29
35-29=2n
6=2n
n=6/2
n=3
n value put into equation 2
m+n=5
m+3=5
m=5-3
m=2
value of m& n put in mn
2*3=6
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