Question

$frac{5}{14}z-frac{1}{3}z+frac{1}{7}z=frac{1}{4}$

Answer 1

файл

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cab7b245d22e15bb29a1433f5fa3dbac.doc

Answer 2

5/14z-1/3z+1/7z=1/4

15/42z-14/42z+6/42z=1/4

7/42z=1/4

1/6z=1/4

z=1/4:1/6

z=3/2=1 1/2=1,5

cab7b245d22e15bb29a1433f5fa3dbac.doc