Math Problem Statement

Find the solution of equations 6x+6y=6 9x+2y=16

Solution

We are given the system of equations:

6x+6y=66x + 6y = 6

9x+2y=169x + 2y = 16

Step 1: Solve for One Variable

To simplify, we can divide the first equation by 6:

x+y=1x + y = 1

9x+2y=169x + 2y = 16

From the first equation, solve for yy:

y=1xy = 1 - x

Step 2: Substitute into the Second Equation

Substituting y=1xy = 1 - x into 9x+2y=169x + 2y = 16:

9x+2(1x)=169x + 2(1 - x) = 16

9x+22x=169x + 2 - 2x = 16

7x+2=167x + 2 = 16

7x=147x = 14

x=2x = 2

Step 3: Solve for yy

Using y=1xy = 1 - x:

y=12=1y = 1 - 2 = -1

Solution:

(2,1)\boxed{(2, -1)}

Would you like a detailed verification?

Related Questions:

  1. How can this system be solved using the elimination method?
  2. What happens if we change the second equation to 9x+2y=109x + 2y = 10?
  3. Can this system be solved graphically? How?
  4. How do we determine if a system of equations has a unique solution, no solution, or infinitely many solutions?
  5. How can we solve this system using matrix methods?

Tip: Always check your solution by substituting it back into the original equations!

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Equations
Substitution Method

Formulas

x + y = 1
9x + 2y = 16

Theorems

Substitution method for solving systems of equations

Suitable Grade Level

Grades 8-10