Find the approximate value of x. 62.5 % of 1239 + x% of 2479 = 1220
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Find the approximate value of x. 62.5 % of 1239 + x% of 2479 = 1220
12
18
28
34
None of these
0.625 * 1239 + (x/100) * 2479 = 1220. Calculating 0.625 * 1239 = 774.375. Then (x/100) * 2479 = 1220 - 774.375 = 445.625. x = 44562.5 / 2479 is approximately 17.97, which rounds to 18.
We first calculate 62.5% of 1239 as five-eighths of 1239, which gives 774.375. Substituting this into the equation gives 774.375 plus x% of 2479 equals 1220, so x% of 2479 is approximately 445.625. Dividing 445.625 by 2479 gives approximately 0.1797, which means x is about 18.