Respuesta :

Answer:

The answer is 10

Step-by-step explanation: So first we divided 15 by 3 which is 5. Then we times 4 and 5 which is 20. 10+x=20, so x = to 10

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Answer:

x = 10

Step-by-step explanation:

4/3 = (x+10)/15

Using cross products

15*4 = 3*(x+10)

60 = 3(x+10)

Divide each side by 3

60/3 = 3/3(x+10)

20 = x+10

Subtract 10 from each side

20-10 = x+10-10

10 = x