2x-6=7, x=?
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(2x - 10) + 7 = 52x - 3 = 52x = 8x = 4
No. 5+9=14. 7+9=16, therefore x=7.
One solution.
Yes. It is THE solution.
The solution set consists of the infinite number of points that lie on the straight line y = -x + 7 or x + y = 7.