Math Problem Statement

4x-2y=8 15x+5y=5

Solution

We have the system of equations:

4x2y=84x - 2y = 8

15x+5y=515x + 5y = 5

Step 1: Solve for one variable

Let's solve for yy using the elimination method. First, multiply the first equation by 5 and the second equation by 2 to make the coefficients of yy equal:

(4x2y)×5=8×5(4x - 2y) \times 5 = 8 \times 5

(15x+5y)×2=5×2(15x + 5y) \times 2 = 5 \times 2

This simplifies to:

20x10y=4020x - 10y = 40

30x+10y=1030x + 10y = 10

Step 2: Add the Equations

(20x10y)+(30x+10y)=40+10(20x - 10y) + (30x + 10y) = 40 + 10

50x=5050x = 50

x=1x = 1

Step 3: Substitute x=1x = 1 into the First Equation

4(1)2y=84(1) - 2y = 8

42y=84 - 2y = 8

2y=4-2y = 4

y=2y = -2

Final Answer:

x=1,y=2x = 1, \quad y = -2

Would you like more details or a different method?


Related Questions:

  1. How do you solve a system of equations using substitution?
  2. What is the determinant method for solving a system of equations?
  3. How can you graphically interpret the solution of this system?
  4. How do you check if the system is consistent or inconsistent?
  5. What happens if the system has no solution or infinite solutions?

Tip:

Always check your solution by substituting the values back into the original equations!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Systems of Equations
Elimination Method

Formulas

Ax + By = C (Standard form of a linear equation)
Elimination Method: Multiply equations to align coefficients and eliminate a variable

Theorems

Properties of Equality
Addition and Multiplication Properties of Equations

Suitable Grade Level

Grades 8-10