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SUPPOSE 13 ORANGES WEIGHS AS MUCH AS 2 MANGOES AND 1 PAPAYA. FURTHERMORE, 4 ORANGES AND 1 MANGO WEIGH AS MUCH AS 1 PAPAYA. HOW MANY ORANGES WEIGH AS MUCH 1 PAPAYA

Sagot :

7 oranges becaause if 13 oranges=2mangoes and 1 papaya 
         If
oranges=1 kilo 
mangoes=3kilo                         4 oranges and 1 mango = 1 papaya
     
                          4 oranges=4
                           1 mango =3
                                         =7                                2 mangoes=6
                                                                            1 papaya =7
                                                                                  =13 oranges



IDaniel2000id
13o=2m+p
4o+m=p

13o=2m+p
- 4o = -m+p
-------------------
9o=3m
3o=m

4o+m=p. substitute m with the value above.
4o+(3o)=m
7o=m

cheers
iDaniel2000