AlgebraEasyIntersection of two lines through equations
Algebra practice question
The lines y = 3x and y = x + 8 intersect at a single point. What is the x-coordinate of that point?
Answer: 4
3x = x + 8 gives 2x = 8, so x = 4.
Common wrong answers
- If you answered 2
- 2 is 8 ÷ 4, dividing by the wrong coefficient.
- If you answered 8
- 8 is the constant in the second equation.
- If you answered 12
- 12 is the y-coordinate.
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