Question

( x - 1 ) - 2 ( x - 2 ) < 3

Answer 1

(x - 1) - 2 (x - 2) < 3
x - 1 - 2x + 4 < 3
x - 2x - 1 + 4 < 3
x - 2x + 3 < 3
- x < 3 - 3
- x  < 0 (-1)
x > 0

R.: {x E R / x > 0}