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5/3 x+ 7/3= 5
3(5/3 x+ 7/3)= 3(5)
5x+7= 15
5x= 15-7
5x= 8
x= 8/5
R. El número es 8/5
Comprobación:
5/3 x+7/3= 5
(5/3×8/5)+7/3= 5
40/15+7/3= 5
8/3+7/3= 5
15/3= 5
5= 5