(90-24,1а)-(15,9а+86)​

Question

(90-24,1а)-(15,9а+86)​

Answer 1

(90-24a)-(15,9a+86)

90-86-15,9a+24a

а=4-33,9

Ответ -29,9

Answer 2

=90-24,1а-15,9а-86=4-40а=4(1-10а