Math Problem Statement

Determine if the point (3/2, -1) lies on both lines in the system of equations: x + 2y + 5 = 0 and -2x = 2y.

Solution

To determine if the point (32,1)\left(\frac{3}{2}, -1\right) lies on both lines of the given system of equations, we substitute x=32x = \frac{3}{2} and y=1y = -1 into each equation.

First Equation:

x+2y+5=0x + 2y + 5 = 0 Substitute x=32x = \frac{3}{2} and y=1y = -1: 32+2(1)+5=322+5=32+3=920\frac{3}{2} + 2(-1) + 5 = \frac{3}{2} - 2 + 5 = \frac{3}{2} + 3 = \frac{9}{2} \neq 0 Thus, the point does not satisfy the first equation.

Since the point fails the first equation, it cannot lie on both lines of the system.

Answer:

No, the point (32,1)\left(\frac{3}{2}, -1\right) does not lie on both lines.


Would you like me to explore the process further or analyze specific parts of this?

Here are 5 related questions for exploration:

  1. How do you verify solutions for systems of equations graphically?
  2. What is the meaning of a point lying on both lines in a system of equations?
  3. How do we find the intersection of two lines algebraically?
  4. Can this system of equations have a solution if this point fails?
  5. What are other methods to solve a system of linear equations besides substitution?

Tip: Always double-check calculations when substituting points into equations to ensure accuracy.

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Equations
Linear Equations

Formulas

Equation of a line (Ax + By + C = 0)
Substitution method for solving systems of equations

Theorems

Substitution Theorem

Suitable Grade Level

Grades 8-10