1) 5x-20=x+8
5x-x=8+20
4x=28
x=7
2) 9-7x-21=5-6x
6x-7x=5+21-9
-x=17
x=-17
3) 7x+9-11x+7=8
-4x=8-9
-4x=-1
x=1/4
4) 3,6+5y=8,4-7y
5y+7y=8,4-3,6
12y=4,8
y=0,4
5)2,4-1,6t=1,9-1,5t+3,5
1,5t-1,6t=1,9+3,5-2,4
-0,1t=3
t=-30
6) 3/16 x-1/4=3x-23/2
3/16 x-3x=1/4-23/2
3-48/16 x=1-46/4
-45/16 x=-45/4
x=45*16/4*45=4
1) 5x-20=x+8
5x-x=8+20
4x=28
x=7
2) 9-7x-21=5-6x
6x-7x=5+21-9
-x=17
x=-17
3) 7x+9-11x+7=8
-4x=8-9
-4x=-1
x=1/4
4) 3,6+5y=8,4-7y
5y+7y=8,4-3,6
12y=4,8
y=0,4
5)2,4-1,6t=1,9-1,5t+3,5
1,5t-1,6t=1,9+3,5-2,4
-0,1t=3
t=-30
6) 3/16 x-1/4=3x-23/2
3/16 x-3x=1/4-23/2
3-48/16 x=1-46/4
-45/16 x=-45/4
x=45*16/4*45=4