Question

8x-12=5340;
255:(x+13)=17.

Answer 1

1) 8х-12=5340

8х=5340+12

8х=5352

х=5352:8

х=669

2) 255:(х+13)=17

х+13=255:17

х+13=15

х=15-13

х=2

Answer 2

Пошаговое объяснение:

1)8x - 12= 5340

8x= 5352

x= 669

2)255:(x+13)=17

$\frac{255}{x + 13} = 17 \\ 255 = 17(x + 13) \\ 15 = x + 13 \\ - x + 15 = 13 \\ - x = 13 - 15 \\ - x = - 2 \\ x = 2$