2x − |x| = −1
x > 0:
2x − x = −1
x = −1;
x < 0:
2x + x = −1
3x = −1

7|x| − 3(x + 2) = −10
x > 0:
7x − 3x − 6 = −10
7x − 3x = −10 + 6
4x = −4
x = −4 : 4
x = −1;
x < 0:
−7x − 3x − 6 = −10
−7x − 3x = −10 + 6
−10x = −4
x = −4 : −10
x = 0,4.