Question

20. Solve 2x + 3y = 11 and 2x - 4y = - 24 and hence find the value of 'm' for which
y=mx + 3.
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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

2x+3y=11. __________(1)

2x-4y=-24. __________(2)

subtracting 1 and 2

2x+3y=11

2x-4y=-24

(-).(+). (+)

________

7y=35

y=35/7

y=5. _______(3)

putting 3 in 1

2x+3y=11

2x+3(5)=11

2x+15=11

2x= 11-15

X=-4/2

X=-2

therefore, y=MX+3

5=m(-2)+3

2m=3-5

m=-2/2. =-1 ans.