Mathematics, 02.04.2020 08:57 andrecoral105
3 ducks and 4 chickens weigh 76kg. 4 ducks and 3 chickens weigh 78kg. All ducks weigh the same and all chickens weigh the same. What is the weight of 1 duck and 1 chicken?
Answers: 2
![\[=3x+4y=76\]](/tpl/images/0577/8270/f331d.png)
     ----- (1)![\[=4x+3y=78\]](/tpl/images/0577/8270/b88d9.png)
    ------- (2)![\[12x+16y=304\]](/tpl/images/0577/8270/74f6d.png)
    ------ (3)![\[12x+9y=234\]](/tpl/images/0577/8270/3da5d.png)
    ------ (4)![\[7y=70\]](/tpl/images/0577/8270/5185a.png)
![\[y=10\]](/tpl/images/0577/8270/9dd70.png)
![\[=3x+ (4 \times 10)=76\]](/tpl/images/0577/8270/69e29.png)
![\[=3x=76-40\]](/tpl/images/0577/8270/f1ffb.png)
![\[=x=12\]](/tpl/images/0577/8270/c86b0.png)
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3 ducks and 4 chickens weigh 76kg. 4 ducks and 3 chickens weigh 78kg. All ducks weigh the same and a...
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