Question

solve 8m+5n=9and 3m+2n=4by elimination method friends help me fast and give full solve

Answer 1

Hello,

Here is your answer...

We have,

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

Now,

We multiply eq,(1) by 3 and eq.(2) by 8

it means,
8m + 5n = 9....× 3
and
3m + 2n = 4 .....×8

We get,

24m + 15n = 27........(3)
24m + 16n = 32........(4)

Now,we subtract eq(3) from eq(4).

we get,

$n = 5$

Now,put this value of n in eq(2)

then,

3m + 2×5 = 4
3m + 10=4
3m=4 - 10
3m = -6
$m = -2$

So,
value of n is 5 and Value of m is -2.

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