Two number are in the ratio 3:5.if each number is increased by 10, the ratio becomes 5:7. The sum of the number is
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3x + 10 + 5x + 10
8x + 20
8x = - 20
x = - 20 / 8
x = - 5 /2
5x = 5 × -5/2 = -25/2
3x = 3× -5/2 = -15/2
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