a)3a-(a-3)=(a-2)+(2a+2)
3a-a+3=a-2+2a+2
3a-a-a-2a=-2+2-3
-a=-3
a=3
. b)-3c+8=-3c+(2c-3)
-3c+8=-3c+2c-3
-3c+3c-2c=-3-8
-2c=-11
c=10,5
c)15-2(c-5)=2(4c-3).
15-2c+10=8c-6
-2c-8c=-6-15-10
-10c= -31
c=3,1
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a)3a-(a-3)=(a-2)+(2a+2)
3a-a+3=a-2+2a+2
3a-a-a-2a=-2+2-3
-a=-3
a=3
. b)-3c+8=-3c+(2c-3)
-3c+8=-3c+2c-3
-3c+3c-2c=-3-8
-2c=-11
c=10,5
c)15-2(c-5)=2(4c-3).
15-2c+10=8c-6
-2c-8c=-6-15-10
-10c= -31
c=3,1