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b=2a-8-----2a= b+8----- a=(b+8) /2
b= 32+c----- c=b-32
a+b+c= 152 se sustituyen el valor de a y de c.
(b+8) +b+b-32=152
-------
2
(b+8) +2b= 152+32
-------
2
8+b+4b
---------- = 184
2
8 +5b= 184(2)
5b=368-8
5b 360
---- = ------
5 5
b= 72
a=8+b/2
a= 8+72/2
a= 80/2
a=40
c=b-32
c=72-32
c=40
verificacion
a+b+c=152
40+72+40=152