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1/3x+0,25x+25,25l=x
1/3x+1/4x-x=-25,5
4/12 x + 3/12 x -x = -25,5
7/12x-x=-25,5l
-5/12x=-25,5l/*(-12/5)
x= 255/10*12/5= 51*6/5=306/5l= 61,2l
Odp. Pojemność bojlera wynosi 61,2 l.
o,25=1/4 l
25 i 1/4 + 1/4 + 1/3 = 25 i 3/12 + 3/12 + 4/12 = 25 i 10/12 = 25 i 5/6 l
Odp.: Bojler pomieści 25 i 5/6 litra wody. :)