Answers

2014-11-10T20:52:39+08:00
Let 'x' be the first number 
     'x+2' be the 2nd
    'x+4' be the 3rd
    'x+6' be the 4th
    'x+8' be the 5th
    'x+10' be the 6th
    'x+12' be the 7th
you'll have the equation as:
 \frac{x+x+2+x+4+x+6+x+8+x+10+x+12}{7} =42
 \frac{7x+42}{7} = 42
7x + 42 = 42(7)
7x + 42 = 294
7x = 252
x = 36
since you are looking for the smallest number and based on variable representation x is the smallest number
therefore the smallest number is 36
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