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d=2
2) 1-31=16×-8×
-30=8x
-30/8=x simplificando
-15/4=x
3) 12p+15p=-30+48
27p=18
p=18/27 simplificando
p=2/3
4) 10+2=R+5R
12=6R
2=R
5) 48=5e+3e
48=9e
48/9=e simplificando
16/3=e