6A-4=-1
6A=-1+4
6A=3
6A/6=3/6
A=0,5
9A+6=13A+14
9A-13A=14-6
-4A=8
-4A/-4=8/-4
A=-2
5-3A=4A-2
-3A-4A=-2-5
-7A=-7
-7A/-7=-7/-7
A=1
7A=63
A=63÷7
A=9
4A+9=-39
4A=-39-9
4A=-48
4A/4=-48/4
A=-12
EXO2
6X+3=4X-3
6X-4X=-3-3
2X=-6
2X/2=-6/2
X=-3
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6A-4=-1
6A=-1+4
6A=3
6A/6=3/6
A=0,5
9A+6=13A+14
9A-13A=14-6
-4A=8
-4A/-4=8/-4
A=-2
5-3A=4A-2
-3A-4A=-2-5
-7A=-7
-7A/-7=-7/-7
A=1
7A=63
A=63÷7
A=9
4A+9=-39
4A=-39-9
4A=-48
4A/4=-48/4
A=-12
EXO2
6X+3=4X-3
6X-4X=-3-3
2X=-6
2X/2=-6/2
X=-3