1) x = 1; 38*1 < 1569
2) x = 1000; 38*1000 > 1569
3) (x+1)(x+2)(x+3) = 60 = 3*4*5
x+1 = 3; x = 2
4) x(x+1)(x+2) = 210 = 5*6*7
x = 5
5) 3x - 1 = 935
3x = 936
x = 936/3 = 312
6) 5x + x = 1308
6x = 1308
x = 1308/6 = 218
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