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Josue Rollins
Mathematics
5 April, 05:27
What is the sum of x + 9?
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Mauricio
5 April, 05:56
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So 30/48=15 / (x+9)
this could be easily solved by recognizing the proportion (the other way is usiing full algebra and doing multiply both sides by 48 (x+9) and then divide both sides by 30 then subtract 9)
30 is 2 times of 15
therefor 48 is 2 times of (x+9)
48=2 times (x+9)
divide both sides by 2
24=x+9
subtract 9
15=x
x=15
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