Zadanie 1
a) 2x+5=17
2x = 17 - 5
2x = 12 /:2
x = 6
b)3x - 4 = x + 9
3x - x = 9 + 4
2x = 13
x = 13/2
x = 6 i 1/2
c) 2(x + 5) = x -4
2x + 10 = x - 4
2x - x = -4 - 10
x = -14
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Zadanie 1
a) 2x+5=17
2x = 17 - 5
2x = 12 /:2
x = 6
b)3x - 4 = x + 9
3x - x = 9 + 4
2x = 13
x = 13/2
x = 6 i 1/2
c) 2(x + 5) = x -4
2x + 10 = x - 4
2x - x = -4 - 10
x = -14