Rozwiąż równanie:
x*10%+25%(12-x)=12*15%
0,1x+3-0,25x=18
-0,15x=15
x=-100
1/10x + 3 - 1/4x = 18
-15/100 = 15 |: -15/100
x= 100
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0,1x+3-0,25x=18
-0,15x=15
x=-100
x*10%+25%(12-x)=12*15%
1/10x + 3 - 1/4x = 18
-15/100 = 15 |: -15/100
x= 100