-(a+4)-19=7
– a – 4 – 19 = 7
– a = 7 + 19 + 4
-a = 30
a = -30
(c-6)-(4.5-c)=-1.5
c – 6 – 4.5 + c = – 1.5
c + c = – 1,5 + 4,5 + 6
2c = 9
c = 4.5
-(a+4)-19=7 – a – 4 – 19 = 7 – a = 7 + 19 + 4 -a = 30 a = -30 (c-6)-(4.5-c)=-1.5 c – 6 – 4.5 + c = – 1.5 c + c = – 1,5 + 4,5 + 6 2c = 9 c = 4.5
-(a+4)-19=7
– a – 4 – 19 = 7
– a = 7 + 19 + 4
-a = 30
a = -30
(c-6)-(4.5-c)=-1.5
c – 6 – 4.5 + c = – 1.5
c + c = – 1,5 + 4,5 + 6
2c = 9
c = 4.5
-(a+4)-19=7 – a – 4 – 19 = 7 – a = 7 + 19 + 4 -a = 30 a = -30 (c-6)-(4.5-c)=-1.5 c – 6 – 4.5 + c = – 1.5 c + c = – 1,5 + 4,5 + 6 2c = 9 c = 4.5