If I had one more sister I would have twice as many sisters as brothers. If I had one more brother I would have the same number of each. How many brothers and sisters have I?
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brothers be x sis be y
y+1=2x. or 2x-y=1 (1)
y=x+1. (2)
put valur of (2) in (1)
2x-(x+1)=1
2x-x-1=1
x=2
so y=3
brothers 2 and sis 3
y+1=2x. or 2x-y=1 (1)
y=x+1. (2)
put valur of (2) in (1)
2x-(x+1)=1
2x-x-1=1
x=2
so y=3
brothers 2 and sis 3
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