Q. Find the x-Intercept of the Line \( 12x + 11y = 8 \)
Answer
- Set y to 0.
\[ 12x + 11(0) = 8 \]
- Solve for x.
\[ 12x = 8 \]
\[ x = \frac{8}{12} \]
- Simplify the fraction.
\[ x = \frac{2}{3} \]
The x-intercept is (2/3, 0).
Detailed Explanation
Step 1 — Understand what the x‑intercept is. The x‑intercept is the point where the graph crosses the x‑axis. At any point on the x‑axis, the y‑coordinate equals 0. Therefore to find the x‑intercept, set y equal to 0 in the equation of the line.
Step 2 — Substitute y = 0 into the equation. Start with the given line: \(12x + 11y = 8\). Replace y with 0 to obtain:
\(12x + 11(0) = 8\)
Step 3 — Simplify the equation after substitution. Compute 11(0) = 0, so the equation becomes:
\(12x + 0 = 8\)
which simplifies to
\(12x = 8\)
Step 4 — Solve for x. Divide both sides of the equation by 12 to isolate x:
\(x = \dfrac{8}{12}\)
Step 5 — Simplify the fraction. The greatest common divisor of 8 and 12 is 4. Divide numerator and denominator by 4:
\(x = \dfrac{8 \div 4}{12 \div 4} = \dfrac{2}{3}\)
Conclusion — x‑intercept as a point. The x‑intercept is the point with x = \(\tfrac{2}{3}\) and y = 0, i.e.
\(\left(\dfrac{2}{3},\,0\right)\)
Graph
Frequently Asked Questions
What is the x-intercept of 12x + 11y = 8?
Why do you set y = 0 to find the x-intercept?
How can I check the x-intercept is correct?
What is the y-intercept of the same line?
What is the slope of the line 12x + 11y = 8?
How do I graph this line quickly using intercepts?
Could line have no x-intercept?
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