Question

solve 8m+5n=9 and 3m+2n=4by subsituitional method answer fast please and give full solving also

Answer 1

8m+5n=9......(1) 3m+2n=4.....,(2)

5n=9-8m

N=(9-8m)/5.......(3)

put the value in eq(2)

3m+2[(9-8m)/5]=4

3m+(18-16m)/5=4

(15m+18-16m)/5=4

15m+18-16m=4×5

18-20=1m

m= -2

n=(9-8m)/5

N=[9-8(-2)]/5

n=(9+16)/5

n=25/5

n=5

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