a-b=c
a+b+c=204
a=b+c
a - (70+c) = c
a= 70+c+c
a=70+2c
(70+2c)+(70+c)+c= 204
140+4c=204
4c=204-140
4c=64
c=16
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a-b=c
a+b+c=204
a=b+c
a - (70+c) = c
a= 70+c+c
a=70+2c
(70+2c)+(70+c)+c= 204
140+4c=204
4c=204-140
4c=64
c=16