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Orlov [11]
3 years ago
14

How do I solve this using elimination? 80x + 45y = 645 x + y = 12

Mathematics
2 answers:
amid [387]3 years ago
8 0
If you combine like terms and do them differently you will have 3 different answers
sergeinik [125]3 years ago
7 0
X + y = 12  / x (-45);
Then, -45x - 45y = -540;
We have 80x + 45y = 645 and
               -45x - 45y = -540
            ________________
                35x           = 105;
Finally, x = 105÷35;
x = 3;
y = 12 - 3;
y = 9;
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