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

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