Question

(i) समीकरण 2x -3y = 13 तथा 7x-2y = 20 को हल कीजिए
y=mx + 7 के लिए m का मान ज्ञात कीजिए।
और
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Answer 1

Answer:

m= -5

Explanation:

•2x-3y=13

multiply eqn. with ×2, we'll get,

4x-6y=26...(i)

•7x-2y=20

multiply eqn. with ×3 we'll get,

21x-6y=60...(ii)

•subtracting eqn. (i) & (ii),

+4x -6y= +26

+21x -6y= +60

(-) (+) (-)

= -17x - 0= -34

x= 2

and, y= -3, (by substituting x value in eqn)

•y=mx+7

-3=m(2)+7 (2m= -10)

m= -5

i hope it will help you