Math homework help?

Posted on 2014-12-16 05:32:00 in Math by DIDO

Solve, using the substitution method. y + 2x = 7 14 – 4x = 2y?
Please explain how to complete this and the problem under this problem.

The solution is (1, 5)
The solution is (21, 0)
There are an infinite number of solutions.
There is no solution.
Please Help Me Solve This Also:

Solve, using the substitution method.
y = 2x + 6
3x – y = 6

(14, 12)
(12, 30)
There is no solution.
There are an infinite number of solutions.

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