Mathematics, 09.12.2019 23:31, nhristov

For the following system, use the second equation to make a substitution for x in the first equation,
3x + 2y = 7
x-y+ 30
what is the resulting equation?
3x -y - 3+ 2y = 7
3(y - 3) + 2y7
3y - 3+ 2y = 7

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For the following system, use the second equation to make a substitution for x in the first equation...