Question
upstudy study bank question image url

\( 2 x-y=-3 \) and \( 3 x+2 y=8 \)

Ask by Parsons Gibbs. in South Africa
Mar 19,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

\( x = \frac{2}{7} \) and \( y = \frac{25}{7} \).

Solution

1. Write down the system of equations: \[ 2x - y = -3 \] \[ 3x + 2y = 8 \] 2. Solve the first equation for \( y \): \[ y = 2x + 3 \] 3. Substitute \( y = 2x + 3 \) into the second equation: \[ 3x + 2(2x + 3) = 8 \] 4. Expand and simplify: \[ 3x + 4x + 6 = 8 \] \[ 7x + 6 = 8 \] 5. Solve for \( x \): \[ 7x = 8 - 6 = 2 \] \[ x = \frac{2}{7} \] 6. Substitute \( x = \frac{2}{7} \) back into \( y = 2x + 3 \) to find \( y \): \[ y = 2\left(\frac{2}{7}\right) + 3 = \frac{4}{7} + 3 \] \[ y = \frac{4}{7} + \frac{21}{7} = \frac{25}{7} \] 7. The solution to the system is: \[ x = \frac{2}{7}, \quad y = \frac{25}{7} \]

Answered by UpStudy AI and reviewed by a Professional Tutor

error msg
Explain
Simplify this solution

Beyond the Answer

To solve the system of equations, let’s express both equations clearly. The first equation is \( 2x - y = -3 \), which can be rearranged to find \( y = 2x + 3 \). The second equation is \( 3x + 2y = 8 \). By substituting \( y \) from the first equation into the second, we get \( 3x + 2(2x + 3) = 8 \). Expanding that gives \( 3x + 4x + 6 = 8 \), simplifying to \( 7x + 6 = 8 \). Thus, \( 7x = 2 \), leading to \( x = \frac{2}{7} \). Now, substituting \( x = \frac{2}{7} \) back into the equation \( y = 2x + 3 \) gives us \( y = \frac{4}{7} + 3 = \frac{4}{7} + \frac{21}{7} = \frac{25}{7} \). So, the solution is \( x = \frac{2}{7} \) and \( y = \frac{25}{7} \). Next time you find yourself dealing with equations, consider using substitution or elimination methods to make it easier, as they help avoid mistakes like miscalculating variables. Also, remember to double-check your work by plugging the values back into both original equations to confirm they truly satisfy the equations.

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy