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kolejne liczby całkowite:
x
x+1
x+2
x+x+1+x+2=15+2(x+2)
3x+3=15+2x+4
3x-2x=15+4-3
x=16
16,17,18 -szukane kolejne liczby całkowite
2.
x = 0,(4) =
y = 0,(36) =
3.
a)
9-1,5x = 6
3 = 1,5x /:1,5
x = 2
2 - 100%
x - 125%
x = 2,5
b)
3x-7 = 0,5x+8
2,5x = 15 /:2,5
x = 6
6 - 100%
x - 125%
x = 7,5