stosunek liczby z do liczby 2 jest równy 4:5 . Oblicz x.
dam naj. :-)
z 4
___ = __
2 5
czyli
z * 5 = 4 * 2
5z = 8 /5
z = 8/5
z = 1,6
z/2= 4/5
x*5=4*2
5x=8 /:5
x=8/5
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z 4
___ = __
2 5
czyli
z * 5 = 4 * 2
5z = 8 /5
z = 8/5
z = 1,6
z/2= 4/5
x*5=4*2
5x=8 /:5
x=8/5