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5x=45
x=9
3x+5=26
3x=21
x=7
-2x-2/3=5 1/3
-2x=6
x=-3
0,6y+ 4/5=12,8
0,6y=13,6
y=68/3
2/3 x-8=7
2/3x=15 |*3
2x=45
x= 22,5
5x=45 | /5
x=9
3x+5=26 |-5
3x=21 | /3
x=7
-2x-2/3=5 1/3 |+2/3
-2x=6 |/(-2)
x=-3
0,6y+ 4/5=12,8 |-4/5
0,6y=12 |/0,6
y=12*5/3
y=20
2/3 x-8=7 |+8
2/3x=15 |*3/2
x=45/2
5x=45 //5
x=9
3x+5=26 /-5
3x=21 /3
x=7
-2x-2/3=5 1/3 /+2/3
-2x=6 /-2
x=-3
0,6y+ 4/5=12,8
0,6y+0,8=12,8 /-0,8
0,6y=12 /0,6
y=20
2/3 x-8=7 /+8
2/3x=15 /2/3
x=22,5