annie2c0ol
annie2c0ol
14-02-2018
Mathematics
contestada
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Respuesta :
liemonder
liemonder
15-02-2018
3x+9=36
with 2 times 9kg and 18kg is the solution:
I:2x+y=36
II:y=x+9
if you substitute y of II into I:
3x+9=36
3x=27
x=9
-> 2 boxes with 9kg and 1 with 9+9=18 kg
2*9+18=36kg in total
so the third option/Rashid is the solution
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