1)12-5x+20=26+3x+15-3x
-5x-3x+3x=26+15-12-20
-5x=9
x=-9/5
2)20x+6+x=5,8
21x=5,8-6
21x=-0,2
x=-1/105
3)14-4,5y=7,4-y
14-7,4=-y+4,5y
6,6=3,5y
y=66/35
1)12-5x+20=26+3x+15-3x
-5x-3x+3x=26+15-12-20
-5x=9
x=-9/5
2)20x+6+x=5,8
21x=5,8-6
21x=-0,2
x=-1/105
3)14-4,5y=7,4-y
14-7,4=-y+4,5y
6,6=3,5y
y=66/35