Math Problem Statement

Solve for the solutions

−4x − 2y = −12 4x + 8y = −24

Solution

We are given the system of linear equations:

  1. 4x2y=12-4x - 2y = -12
  2. 4x+8y=244x + 8y = -24

Step 1: Simplify the equations if possible

We can divide both sides of the first equation by 2-2 to simplify it: -4x - 2y = -12 \quad \Rightarrow \quad 2x + y = 6 \tag{1}

The second equation can also be simplified by dividing both sides by 44: 4x + 8y = -24 \quad \Rightarrow \quad x + 2y = -6 \tag{2}

Now, we have the simplified system:

  1. 2x+y=62x + y = 6
  2. x+2y=6x + 2y = -6

Step 2: Solve using substitution or elimination

Let's use the substitution method. From equation (2), solve for xx: x = -6 - 2y \tag{3}

Step 3: Substitute into equation (1)

Substitute x=62yx = -6 - 2y into equation (1): 2(62y)+y=62(-6 - 2y) + y = 6 124y+y=6-12 - 4y + y = 6 123y=6-12 - 3y = 6 3y=18-3y = 18 y=6y = -6

Step 4: Solve for xx

Now, substitute y=6y = -6 into equation (3): x=62(6)=6+12=6x = -6 - 2(-6) = -6 + 12 = 6

Solution:

The solution to the system is: x=6,y=6x = 6, \quad y = -6

Would you like more details, or have any questions?


Here are 5 related questions for further practice:

  1. Solve the system: 3x2y=73x - 2y = 7 and 5x+y=135x + y = 13.
  2. Solve using the elimination method: x+3y=12x + 3y = 12 and 2xy=32x - y = 3.
  3. Find the intersection point of the lines y=2x5y = 2x - 5 and y=x+4y = -x + 4.
  4. Solve the system of equations: 4x+5y=14x + 5y = 1 and 2x3y=72x - 3y = -7.
  5. Solve for xx and yy: x4y=10x - 4y = 10 and 2x+y=32x + y = 3.

Tip: Always check your solutions by substituting the values of xx and yy back into the original equations!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
System of Equations

Formulas

Equation Simplification
Substitution Method

Theorems

Properties of Equality

Suitable Grade Level

Grades 8-10