Question

2. Aflati numarul natural necunoscut a)3×+1=x+5=>x=
c)24:x=6=>x=
c)2x-3=17=>x=​

Answer 1

Răspuns:

a)

3x + 1 = x + 5

3x - x = 5 - 1

2x = 4

x = 4 : 2

x = 2

c)

24 : x = 6

x = 24 : 6

x = 4

c)

2x - 3 = 17

2x = 17 + 3

2x = 20

x = 20 : 2

x = 10 ​

Answer 2

Răspuns:

Explicație pas cu pas:

$a)~~ 3x + 1 = x + 5 \Rightarrow 3x=x+5-1\Rightarrow$

$\Rightarrow 3x=x+4\Rightarrow 3x-x=4\Rightarrow2x = 4 \Rightarrow\boxed{x = 2}$

$b)~~ 24 : x =6\Rightarrow 24 = 6x\Rightarrow x=24:6\Rightarrow \boxed{x=4}$

$c)~~2x-3=17\Rightarrow 2x=17+3\Rightarrow 2x=20\Rightarrow x=20:2\Rightarrow \boxed{x=10}$