Solve the Linear System: Find Solutions for x/2 + y = 3, x + 2y = 6

Question

x2+y=3 \frac{x}{2}+y=3

x+2y=6 x+2y=6

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Express one equation in terms of a single variable.
  • Step 2: Substitute into the other equation.
  • Step 3: Evaluate and determine the solution type.

Now, let's work through each step:
Step 1: Solve the first equation for xx:
x2+y=3x=62y\frac{x}{2} + y = 3 \quad \Rightarrow \quad x = 6 - 2y.

Step 2: Substitute x=62yx = 6 - 2y into the second equation:
x+2y=6(62y)+2y=6x + 2y = 6 \quad \Rightarrow \quad (6 - 2y) + 2y = 6.

Step 3: Simplifying equation:
62y+2y=66=66 - 2y + 2y = 6 \quad \Rightarrow \quad 6 = 6.

This equation 6=66 = 6 is always true, indicating that both equations are dependent and represent the same line.

Therefore, the system has infinite solutions.

Answer

Infinite solutions