Question

11(y-4)+10(5-3y)-3(4-3y)=-6
10(3x-2)-3(5x+2)+5(11-4x)=25
Решить уравнение.

Answer 1

11y - 44 + 50 - 30y - 12 + 9y = - 6
- 19y + 9y = - 6 + 6
- 10y = 0
y = 0

30x - 20 - 15x - 6 + 55 - 20x = 25
15x - 20x = 26 - 55 + 25
- 5x = - 29 + 25
- 5x = - 4
5x = 4
x = 4/5
x = 0,8