Math Problem Statement

Solve the system of equations: y = 3x and 2x + 2y = 34.

Solution

To solve this system of equations, let's go through the steps:

The system of equations given is:

  1. y=3xy = 3x
  2. 2x+2y=342x + 2y = 34

Step 1: Substitute yy in the second equation

Since y=3xy = 3x from the first equation, substitute yy in the second equation: 2x+2(3x)=342x + 2(3x) = 34

Step 2: Simplify and Solve for xx

Expanding the terms: 2x+6x=342x + 6x = 34 Combine like terms: 8x=348x = 34 Now, divide both sides by 8 to solve for xx: x=348=174=4.25x = \frac{34}{8} = \frac{17}{4} = 4.25

Step 3: Substitute xx back to find yy

Now that we have x=4.25x = 4.25, substitute it back into the equation y=3xy = 3x: y=3×4.25=12.75y = 3 \times 4.25 = 12.75

Solution

The solution to the system is: x=4.25,y=12.75x = 4.25, \quad y = 12.75

Would you like more details, or do you have any questions?

Here are 5 related questions for further practice:

  1. How would you solve if the first equation was y=2xy = 2x instead of y=3xy = 3x?
  2. What if the second equation was 2x+y=342x + y = 34?
  3. How can you check if the solution is correct by substituting back?
  4. What happens if both equations are in terms of yy and you need to solve for xx?
  5. How would you graph these equations to find the intersection point visually?

Tip: Always verify your solution by substituting it back into the original equations to ensure both are satisfied.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Systems of Equations

Formulas

Substitution method

Theorems

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Suitable Grade Level

Grades 8-10