Two lines, r and m, are represented by the following equations:
line r: 2x + 2y = 18
line m: x + y = 9
which statement is true about the solution to the set of equations?
it is (18, 9).
it is (9, 18).
there are infinitely many solutions.
there is no solution.

If you would like to know what is true about the solution of the set of equations, you can calculate this using the following steps:

2x + 2y = 18
x + y = 9    /*2


2x + 2y = 18
2x + 2y = 18

2x + 2y = 2x + 2y
18 = 18
0 = 0

The correct result would be infinitely many solutions.

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