Question

2x-5=-17

4.(x+41)=400

219-7.(x+1)=10²

Answer 1

https://i.imgur.com/TUaYbLe.jpg

Answer 2

Đề bài : Tìm số nguyên x

2x-5=-17

2x=(-17)+5

2x=-12

x=(-12):2

x=-6

Vậy x=-6.

4(x+41)=400

x+41=400:4

x+41=100

x=100-41

x=59

Vậy x=59

219-7(x+1)=10²

219-7(x+1)=100

7(x+1)=219-100

7(x+1)=119

x+1=119:7

x+1=17

x=17-1

x=16

Vậy x=16.

Answer 3

2x - 5 = -17

2x = -17 + 5

2x = -12

x = -12 : 2

x = -6

Vậy x = -6

4 . (x + 41) = 400

(x + 41) = 400 : 4

(x + 41) = 100

x = 100 - 41

x = 59

Vậy x = 59

219 - 7 . (x + 1) = 10²

219 - 7 . (x + 1) = 100

7 . (x + 1) = 219 - 100

7 . (x + 1) = 119

(x + 1) = 119 : 7

(x + 1) = 17

x = 17 - 1

x = 16

Vậy x = 16