Mathematics, 26.09.2019 06:30 karmaxnagisa20
Anumber is decreased by seven. then, the new number is multiplied by 3 to get an answer of -9. what is the original number?
a) -30
b) 30
c) 4
d) -4
Answers: 1
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Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14
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Anumber is decreased by seven. then, the new number is multiplied by 3 to get an answer of -9. what...
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