solve 2x+3y=11 and 2x-4y= -24 and hence find the value of 'm'
for which y=mx+3
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- 2x+3y=11 --- 1
- 2x-4y=-24 ---2
- we subtract 1 and 2
- 2x+3y=11
- -2x+ 4y=24
- 7y=35
- y=5
- 2x+3y=11
- 2x+3×5=11
- 2x+15=11
- 2x=11-15
- 2x=-4
- x=-2
- y=mx+3
- 5=m×(-2) +3
- 5-3= -2m
- 2= -2m
- -1= m
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