Rozwiąż równania: a) 2x-5=20
b) 4x-2=x+5
c) 5x+15=20-x
d) 4x-30=2x+1
Daje naj.:)
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2x = 25
x = 12,5
b)4x - 2 = x + 5
3x = 7
x = 7/3
c)5x+15 = 20-x
6x = 5
x = 5/6
d) 4x - 30 = 2x + 1
2x = 31
x = 15,5