Answers

1. There are infinitely many solutions to a linear equation with the same variable term on both sides of the equation.

   We have to find the coefficient of “b”

   from first equation:

   • 2a + b = -6

   • b = -6 – 2a

   from second equation:

   • 6a + kb = -18

   • b = (-18 – 6a)/k

   solve them simultaneously:

   • (-18 – 6a)/k = -6 – 2a

   • (-18 – 6a)/(-6 – 2a) = k

   • k = 3

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