xbox360isaac
xbox360isaac
09-11-2020
Mathematics
contestada
Help with this substitution
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lilstefy
lilstefy
09-11-2020
Since x = 3y + 15, plug that into the other equation.
5x + 2y = 7
5(3y + 15) + 2y = 7
15y + 75 + 2y = 7
17y = 7-75
17y = -68
y = -4
I hope this helps. (x = 3 and y = -4)
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