Tìm số nguyên x

a) 2x – 35 = 15
$\Leftrightarrow $2x = 15 + 35  
$\Leftrightarrow $2x = 50
$\Leftrightarrow $x = 50:2
$\Leftrightarrow $x = 25

b) 3x + 17 = 2
$\Leftrightarrow $3x = 2 – 17 
$\Leftrightarrow $3x = -15
$\Leftrightarrow $x = -15:3
$\Leftrightarrow $x = -5

c) |x – 1| = 0
$\Leftrightarrow $x – 1 = 0
$\Leftrightarrow $x = 0 + 1  
$\Leftrightarrow $x = 1