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Mathematics, 10.05.2021 20:10 armstrongstang420

Monifer used substitution to solve this system of equations. Which equation could be the result of her
first step?
3a + b = 225
b = a - 15

options:
3a + a = 225
3a + a - 15 = 225
b= 3a + b
3a + b = a - 15

ansver
Answers: 3

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Monifer used substitution to solve this system of equations. Which equation could be the result of...
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