Question 930339
x the second number
1st + 2nd + 3rd = 26
2x + x + (4x - x/2) = 26
2x + x + (7/2)x = 26
4x + 2x + 7x = 52
13x = 52
x = 4
Numbers are: 8{{{2*4}}}, 4, 14{{{4*4-2}}}
and...checking
8 + 4 + 14 = 26