Question

Dau coroana va rig frumos​

Answer 1

Răspuns:

0,005 x 10^n = 5

0,005 x 10^n : 0,005 = 5 : 0,005

10^n = 5: 0,005

10^n = 1000

10^n = 10 ^ 3

n=3

8,4 - x-x = -1,6

-2x = -1,6 - 8,4

-2x = -10

x=5

Answer 2

Răspuns: Ai rezolvarea mai jos

Explicație pas cu pas:

$\large\bf 0,005 = \dfrac{5}{10^{n}}$

$\large\bf \dfrac{5}{1000} = \dfrac{5}{10^{n}} \implies 5\cdot 1000 = 5\cdot 10^{n}~~~\bigg|:5\implies$

$\large\bf 1000 = 10^{n}\implies 10^{3} = 10^{n}\implies \red{\boxed{\bf n = 3}}$

===================

$\large \bf 8,4 - x=x -1,6$

$\large \bf 8,4 =x -1,6+x$

$\large \bf 8,4 =2x -1,6$

$\large \bf 8,4+1,6 =2x$

$\large \bf 10 =2x~~~\bigg|:2$

$\pink{\Large \boxed{\bf x = 5}}$

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