1. **State the problem:**
We have two lines:
- Line L₁ passes through point R(1, 2) with slope 3.
- Line L₂ is given by the equation $y = -2x + 5$.
We need to:
a) Find the equation of line L₁.
b) Find the point where L₁ and L₂ intersect.
2. **Find the equation of L₁:**
The point-slope form of a line is:
$$y - y_1 = m(x - x_1)$$
where $m$ is the slope and $(x_1, y_1)$ is a point on the line.
Given $m=3$ and point $R(1, 2)$:
$$y - 2 = 3(x - 1)$$
Simplify:
$$y - 2 = 3x - 3$$
$$y = 3x - 3 + 2$$
$$y = 3x - 1$$
So, the equation of L₁ is:
$$y = 3x - 1$$
3. **Find the intersection point of L₁ and L₂:**
Set the two equations equal since at intersection $y$ values are the same:
$$3x - 1 = -2x + 5$$
Add $2x$ to both sides:
$$3x + 2x - 1 = 5$$
$$5x - 1 = 5$$
Add 1 to both sides:
$$5x = 6$$
Divide both sides by 5:
$$x = \frac{6}{5} = 1.2$$
Substitute $x=1.2$ into L₁ equation to find $y$:
$$y = 3(1.2) - 1 = 3.6 - 1 = 2.6$$
4. **Final answer:**
- Equation of L₁: $y = 3x - 1$
- Intersection point: $\left(1.2, 2.6\right)$
Line Intersection F3Ec85
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