If: -3a-1 = -15
Then: a = 4 and 2/3
There are an infinite number of solutions for the equation x/y = 15. One example is; 60/4=15
0 + 17, 1 + 16, 2 + 15, etc.; in fact there are infinitely many solutions.
If: 11x+25 = 7x+15 then there is only one solution and it is x = -2.5
x2-35x+300 = 0 (x-15)(x-20) = 0 x = 15 or x = 20
The two rational solutions are (0,0,0) and (1,1,1). There are no other real solutions.
It is a quadratic equation and its solutions are: x = 3 and x = 5
It works out that the solutions are: x = 3 and y = 2
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15 to the 2nd power or 15 squared equals 15 * 15 which equals 225.
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There is only one solution: x = 15. Consequently the remainder of the question is nonsense.
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