kingjunim
kingjunim
15-03-2017
Mathematics
contestada
if 3y+5=7x, then 21y-49x=?
Respuesta :
irspow
irspow
25-03-2017
3y+5=7x
3y=7x-5
y=(7x-5)/3
...
21y-49x becomes
7(7x-5)-49x
49x-35-49x
-35
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