Question

1) 7(x + 2) = -14;
2) 8y = 2(5 - y);
3) 2(3x – 4) = 4(x – 3);
4) 7(x + 3) - 2(x - 5) = 8;
5) 5+3(2Y - 1) = 2(y - 3);
6) -X -5,2 = 12-2(x +0,6) - 10​

Answer 1

Ответ:

1) 7x + 14= -14

7x= -14-14

x= -4

2) 8y = 25-2y

8y+2y=25

y= 2,5

3) 6x-8=4x-12

6x-4x=8-12

x= -2

4) 7x+21-2x+25=8

7x-2x=-21-25+8

x= -7, 6

5) 5+6y-3=2y-6

6y-2y=-5+3-6

y= 0,5

6) -x-5,2= 12-2x-1,2-10

-x+2x= 5,2+12-1, 2-10

x= 6

Answer 2

Ответ:

1)7(x+2)=-14;

x+2=-2

x=-2-2

x=-4

2)8y=2(5-y);

8y=10-2y

8y+2y=10

10y=10

y=1

3)2(3x-4)=4(x-3);

6x-8=4x-12

6x-4x=-12+8

2x=-4

x=-2

4)7(x + 3) - 2(x - 5) = 8;

7x+21-2x+10=8

5x+31=8

5x=8-31

5x=-23

x=-23/5

5) 5+3(2Y - 1) = 2(y - 3)

5x+6y-3=2y-6

5x=2y-6-6y+3

5x=-4y-3

x=-4/5y-3/5

x=-4/5y-3/5,y€R