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cluponka [151]
3 years ago
14

Please help me solve this! Will give Brainliest! Please help quickly!

Mathematics
1 answer:
dangina [55]3 years ago
7 0

Answer:

y = 6.5

Step-by-step explanation:

Using a ratio

10           13

-----    = -----------

10+5      13+y

10           13

-----    = -----------

15        13+y

Using cross products

10(13+y) = 13*15

10(13+y) = 195

130+10y = 195

Subtract 130 from each side

10y = 65

Divide by 10

y = 65/10

y = 6.5

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