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If Two Sides of a Triangle Are Unequal, Then the Angle Opposite to the Greater Side Is Greater Than Angle Opposite to the Smaller Side

If 4m+5n=7....

Question

If $4 m + 5 n = 7$ . Find $m$ when $n = - 5$

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Solution

$4 m + 5 n = 7$

Put $n = - 5$ in above equation

$4 m + 5 (- 5) = 7$

$4 m - 25 = 7$

$4 m = 7 + 25$

$4 m = 32$

$m = \frac{32}{4}$

$m = 8$ .

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