Помогите решите уравнения
-2x+19 =5x-16
8x-25=3x+20
6-y=3×(3y-8)
5 (y+1.2)=7y+4
4 (x-3)=5(x-5)
3x-17=8x+18
11-5y=12-6y
4y+(11.8-y)=3.8-5y
3x+16=8x-9

Вопрос школьника по предмету Математика

1)-2x+19=5x-16

-2x-5x=-19-16

-7x=-35

x=5

2)8x-25=3x+20

8x-3x=20+25

5x=45

x=9

3)6-y=3(3y-8)

6-y=9y-24

-9y-y=-24-6

-10y=-30

y=3

4) 5(y+1.2)=7y+4

5y+6=7y+4

5y-7y=4-6

-2y=-2

y=1

5) 4(x-3)=5(x-5)

4x-12=5x-25

4x-5x=-25+12

-x=-13

x=13

6) 3x-17=8x+18

3x-8x=18+17

-5x=35

x=-7

7)11-5y=12-6y

-5y+6y=12-11

y=1

8) 4y+(11.8-y)=3.8-5y

4y+11.8-y=3.8-5y

4y-y+5y=3.8-11.8

8y=-8

y=-1

9) 3x+16=8x-9

3x-8x=-9-16

-5x=-25

x=5