peytonwray04
03.10.2020 •
Mathematics
The balance in Alice’s back account was 145.00 but she used her debit card to make an purchase of 1800.00 what is the new balance in Alice’s bank account: ?
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Ответ:
The answer is B multiply the bottom equation by 2
Step-by-step explanation:
3x + 4y = 8
6x - 2y = 9
By multiplying the bottom equation by 2 it will be
12x - 4y = 18 ⇒ add this with the first equation
4y + -4y = 0 so y is eliminated