Question

5(3 - 2у) - 4(9 - у) = 3(у + 5) - 21

Answer 1

15-10y-36+4y=3y+15-21 -10y+4y-3y=-15+36+15-21 -9y=15 Y=-15/9

Answer 2

5(3+(-2y)) - 4(9+(-y)) = 3(y+5) - 21

15 - 10y - 36 + 4y = 3y + 15 - 21

-21 - 6y = 3y - 6

-21 + 6 = 3y + 6y

-15 = 9y

y = -15/9

y = -5/3

Ответ: y = -5/3