Question

13(х-3) =78
Помогите пожалуйста
(х+14)18=396​

Answer 1

13(х - 3) = 78

13х - 39 = 78

13х = 78 + 39

13х = 117

х = 117 : 13

х = 9

(х + 14)18 = 396

18х + 252 = 396

18х = 396 - 252

18х = 144

х = 144 : 18

х = 8