12. Two numbers are in the ratio 2:3. If each number is increased by 12, the ratio becomes 3:4. Find the first
number
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solution:
2x+12 by 3x+12=3/4
8x+48=9x+36
48-36=9x-8x
12= 1x
hence, the first no. is 2x=2×1
=2
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