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It is: (92+136)/2 = 114
x is the 'unknown quantity' the sum is x+4=92 so an 'unknown quantity' has 4 added to it and the answer is 92, so if we now subtract 4 from 92 we will now know what the value of x is. 92-4= 88 so x=88
Add 7x to each side: 136 = 27x + 20 Subtract 20 from each side: 116 = 27x Divide each side by 27: x = 116/27 = 4 & 8/27.
I think you mean range. To find the range of a set of data, subtract the lowest number from the highest number. Example: 45 78 92 27 34 18 Higest Number: 92 Lowest Number: 18 92 - 18 = 74
136 + 136 = 272