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0,8x=y
x-0,8x=2
0,8x=y
0,2x=2
0,8x=y
x=10
0,8*10=y
x=10
y=8
II liczba - x+2
x+2-20%(x+2) = x
x+2-0,2x-0,4 = x
0,8x+1,6 = x
x = 0,8x+1,6
x-0,8x = 1,6
0,2x = 1,6 |:0,2
x = 8
I liczba - 8
II liczba - 8+2 = 10