Algebra practice question

Answer: 6

No solution means parallel lines: the coefficient ratios must match, k/3 = 2/1, so k = 6. (The constants' ratio 7/4 differs, so the lines are distinct.)

Common wrong answers

If you answered 2

2 copies the y-coefficient.

If you answered 3

3 copies the x-coefficient of the second equation.

If you answered 1.5

1.5 inverts the ratio (3/2).

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