Rozwiąż równanie;
x= 1/6 x + 1/12x +1/7 x + 5 + 1/2 x +4
(1/2 to jedna druga, 1/7 to jedna siódma itp.)
Potrzebuje to na za 10 minut !!
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x=2/12x+1/12x+ 6/12x +1/7x+9
x=9/12x+1/7x+9
x= 63/84x+ 12/84x +9
x=75/84x+9
x-75/84x=9 /:3
x-25/28x=3
3/28x=3 /:3
28x = 1
x= 1/28