Question

Calculati termenul necunoscut din:
a) 5/x= 0,20

b) x/9=4,2

c) 11/x=1,4
Scuzatima am grasit Materia

Answer 1

a)
5/x=0,20   =>5/x=20/100  ( cate cifre avem dupa virgula) inmultim termenii pe diagonale  =>5*100=20x   =>500=20x  x=500/20=25  =>x=25                   b)

x/9=4,2   =>x/9=42/10  10x=42*9   =>10x=378    =>x=378/10=37,8    =>x=37,8

c)11/x=1,4     =>11/x=14/10     =>11*10=X*14    =>110=14x    X=110/14=7,14