Question

Tìm số nguyên x biết 

a) 316 - x = 254

b) 23 + 3x = 5⁶ : 5³

c) -3 < hoặc bằng x < hoặc bằng 0

Answer 1

a)

316 - x=254

<=>x=316-254

<=>x=62

b

23+3x=5^6 : 5^3

<=>23 + 3x=5^3

<=>3x=5^3-23

<=>3x=102

<=>x=34

c

\(-3\le x\le0\)

<=>\(x\in\left\{-3;-2;-1;0\right\}\)

 

Answer 2

a)316-x=254

x=316-254

x=62

b)23+3x=5^6:5^3

23+3x=5^3

23+3x=125

3x=125-23

3x=102

x=102:3

x=34

c) x thuoc{-2;-1;0}

Answer 3

kb cho mik xin kb