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
Răspuns: Ai rezolvarea mai jos
Explicație pas cu pas:
[tex]\large\bf 0,005 = \dfrac{5}{10^{n}} [/tex]
[tex]\large\bf \dfrac{5}{1000} = \dfrac{5}{10^{n}} \implies 5\cdot 1000 = 5\cdot 10^{n}~~~\bigg|:5\implies [/tex]
[tex]\large\bf 1000 = 10^{n}\implies 10^{3} = 10^{n}\implies \red{\boxed{\bf n = 3}}[/tex]
===================
[tex]\large \bf 8,4 - x=x -1,6[/tex]
[tex]\large \bf 8,4 =x -1,6+x[/tex]
[tex]\large \bf 8,4 =2x -1,6[/tex]
[tex]\large \bf 8,4+1,6 =2x[/tex]
[tex]\large \bf 10 =2x~~~\bigg|:2[/tex]
[tex]\pink{\Large \boxed{\bf x = 5}}[/tex]
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