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7c - 3 = 6c + 5
7b - 7 = 2b + 13
2a - 3 = a- a + 1
4b + 3 = 3b -4
7+ 3c = ( - 5 ) + 2c
5 d + 2 = 3d.
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7c - 3 = 6c + 5
7c-6c = 5+3
c=8
7b - 7 = 2b + 13
7b-2b=13+7
5b=20 /:5
b=4
2a - 3 = a- a + 1
2a-a+a = 1+3
2a=4 /:2
a=2
4b + 3 = 3b -4
4b-3b=-4-3
b = -7
7+ 3c = ( - 5 ) + 2c
3c-2c = -5-7
c=-12
5 d + 2 = 3d.
5d-3d = -2
2d = -2 /:2
d=-1
7c-3=6c+5
7c-6c=5+3
c=8
7b-7=2b+13
7b-2b=13+7
5b=20 /:5
b=5
2a-3=a-a+1
2a-a+a=1+3
2a=4 /:2
a=2
4b+3=3b-4
4b-3b= -4-3
b= -7
7+3c= -5+2c
3c-2c= -5-7
c= -12
5d+2=3d
5d-3d= -2
2d =-2 /:2
d= -1