Wyznacz niewiadomą x, gdy:
(x: 1/5-1,25*1cała 1/4):5/2 =a
wiedząc, ze a to 5
(x;1/5)* 2/5)-(3/2*5/4*2/5)=5
2x-3/4x=5
5/4x=5
x=5:5/4
x=5*4/5=4
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(x;1/5)* 2/5)-(3/2*5/4*2/5)=5
2x-3/4x=5
5/4x=5
x=5:5/4
x=5*4/5=4