Question

Aflați numărul natural necunoscut:


2x=x+3 =x?
24÷=6 =x?
x+5=31 =x?
2x-3=17 =x?
3(x+1)-2=16 =x?

Answer 1

2x=x+3》x=3
24:x=6》x=24:6=4
x=31-5=26
2x=17+3》x=20/2=10
3x+3-2=16 3x+1=16 3x=15 x=5

Answer 2

2x = x + 3 => 2x - x = 3 => x = 3
 
24 ÷ x = 6 => x = 24 ÷ 6 => x = 4
 
x + 5 = 31 => x = 31 - 5 => x = 26
 
2x - 3 = 17 => 2x = 17 + 3 => 2x = 20 => x = 10
 
3(x + 1) - 2 = 16 => 3x + 3 - 2 = 16 => 3x = 16 - 3 + 2 => 3x = 15 => x = 5