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shusha [124]
3 years ago
9

What is the value of X?

Mathematics
1 answer:
vodomira [7]3 years ago
3 0

Answer:

x =28

Step-by-step explanation:

We can use proportions to solve this problem,  Put the side of the small triangle over the side of the large triangle.

x             42

------- = -----------

x+10       42 + 15

Simplify

x             42

------- = -----------

x+10      57

Using cross products

57*x = 42 (x+10)

Distrbute 42

57x = 42x+420

Subtract 42x from each side

57x -42x = 42x-42x+420

15x = 420

Divide by 15

15x/15 = 420/15

x =28

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