Math Problem Statement

Solve the system of equations: -6x + y = 16 and 7x + 4y = 2.

Solution

The given system of equations is:

6x+y=16-6x + y = 16

7x+4y=27x + 4y = 2

Solving for xx and yy:

Step 1: Express yy in terms of xx

From the first equation:

y=6x+16y = 6x + 16

Step 2: Substitute into the second equation

7x+4(6x+16)=27x + 4(6x + 16) = 2

7x+24x+64=27x + 24x + 64 = 2

31x+64=231x + 64 = 2

31x=6231x = -62

x=2x = -2

Step 3: Solve for yy

Substituting x=2x = -2 into y=6x+16y = 6x + 16:

y=6(2)+16y = 6(-2) + 16

y=12+16y = -12 + 16

y=4y = 4

Final Answer:

(2,4)\boxed{(-2, 4)}

Would you like a detailed explanation of any step?

Related Questions:

  1. How can we solve this system using the elimination method?
  2. What is the determinant of the coefficient matrix in this system?
  3. How can we graph these equations and find the solution visually?
  4. Can we solve this system using matrices (Gaussian elimination or inverse matrix method)?
  5. How does changing the coefficients in the equations affect the solution?

Tip:

When solving a system of equations, always check your solution by substituting back into the original equations to verify correctness.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Systems of Equations

Formulas

y = mx + b (slope-intercept form)
Substitution method

Theorems

Properties of equality

Suitable Grade Level

Grades 9-11