Question

cac ban va cac anh chj jup e

Answer 1

-12(x – 5) + 7(3 – x) = 5

-12x – (-12). 5 + 7 . 3 – 7x = 5

-12x + 12 . 5 + 7 . 3 – 7x = 5

-12x + 60 + 21 – 7x = 5

-12x – 7x = 5 – 60 – 21

(-12 – 7). x = -76

-19x = -76

x = -76 : (-19)

x = 4

Vậy x = 4

Answer 2

Bài này mà m ko biết giải à V~!~~~~~~~~~~~~~~

Answer 3

-12(x - 5) + 7(3 - x)= 5

-12x + 60 + 21 - 7x = 5

(-12-7x)+60+21=5

-19x + 81 = 5

-19x = 5 - 81

-19x = -76

x = -76 : (-19)

x = 4

Vậy x = 4

Goodluck! ^_^