Question

1440.
1) [2(x-2y)=x-8y,
15(x+y)=2(x-y)+10;
3) [15+2(x+3y)=3(4x + y),
2 (5x-y)-3y=2+3(2x-y);
2) [3(x+4y) - 4x = 2(2x+y), 4) (5 (7x+2y)-11y = 6(2x+y)+2,
7(x-5y)+6x=3(x+4y) +27;
33+3 (6x-5y)=3(x+2y)-5y.
помогите пожалуйста

Answer 1

Ответ:

1) 2(x-2y}=x-8y

5(x+y) =2(x-y) +10

2x-4y=x-8y

5x+5y=2x-2y+10

2x-x-4y+8y=10

5x-2x+5y+2y=10

3x-4y=10

3x+7y=10 (× -1)

3x-4y=10

-3x-7y=-10

-y=0

x= 0.3