math HELP!!

(1) y/3+3y/3=4 , 4y/3=4, y=4*3/4, y=3

(2) 8/4-y/4=2y/4, 8-y=2y, 3y=8, y=8/3

(3) 4-2y=3y, 5y=4, y=4/5

(4) 5x+9=8x, 3x=9, x=3

(5) 3(6x-1)=12x-4, 18x-3=12x-4, 6x=-1, x=-1/6

1.)
y/3+y=4
y/3+3y/3=4
(y+3y)/3=4
4y=12
y=3

2.)
2- y/4=y/2
4( 2- y/4)= 4(y/2) 8-y=2y
3y=8
y=8/3

3.)
1-y/2=3y/4
4(1-y/2)=4(3y/4)
4-2y=3y
4=5y
y=4/5

4.)
(5x+9)/2=4x
(5x+9)=8x
9=3x
x=3

5.)
( 6x-1) /4 = x-1/3
6x-1 = 4(x-1/3)
2x = 1-4/3
2x = -1/3
x = - 1/6

1.) y/3+y=4
y/3+3y/3=4
(y+3y)/3=4
4y=12
y=3

2.) 2- y/4=y/2
4( 2- y/4)= 4(y/2) 整條式乘以4
8-y=2y
3y=8
y=8/3

3.) 1-y/2=3y/4
4(1-y/2)=4(3y/4)
4-2y=3y
4=5y
y=4/5

4.) (5x+9)/2=4x
(5x+9)=8x
9=3x
x=3

5.) ( 6x-1) /4 = x-1/3
6x-1 = 4(x-1/3)
2x = 1-4/3
2x = -1/3
x = - 1/6