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inessss [21]
3 years ago
13

Two numbers are in the ratio 1:2. If 7 is to be added to both, then ratio changes to 3:5, find the numbers

Mathematics
1 answer:
lana [24]3 years ago
3 0

Let numbers be x and 2x

ATQ

\\ \rm\longmapsto \dfrac{x+7}{2x+7}=\dfrac{3}{5}

\\ \rm\longmapsto 5(x+7)=3(2x+7)

\\ \rm\longmapsto 5x+35=6x+21

\\ \rm\longmapsto 6x-5x=35-21

\\ \rm\longmapsto x=14

  • 2x=2(14)=28years
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3 years ago
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4 years ago
x = 4y - 2 x - 3y = 6 If you were going to solve this equation by substitution, what would your first step look like?
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