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a) |3x + 4| = 5
|3x + 4| = 5 /-4
3x = 5 - 4
3x = 1 / : 3
x = 1/3
b) 3|x - 2| + 2|x-2|-5 = 2|x-2|+7
3x - 6 + 2x -4 - 5 = 2x -4 +7 (x- na jedna strone, liczby na druga)
3x+2x-2x = -4 + 7 +6+4+5
3x = 18 / : 3
x = 6
c) |2x +1| = |x+5|
2x - x = 5-1
x = 4
Ćw.2
a) |x+2| + |x-1| = 3
x + 2 + x - 1 = 3
2x = 3 - 2 +1
2x = 2 / : 2
x = 1
b) |x - 2| + |x| = 4
x - 2 + x = 4
x + x = 2+ 4
2x = 6 / : 2
x = 3
c) |x + 3| + |x - 1| = 5
x +3 + x - 1 = 5
2x = 5 - 3 + 1
2x = 3 / : 2
x = 3/2