Final answer:
To solve the system of equations 8x + 2y = -12 and 5x - y = 4, we can use the method of substitution. By solving the second equation for y and substituting that into the first equation, we can find the values of x and y. The solution to the system is x = -2/9 and y = -38/9.
Step-by-step explanation:
The given system of equations is:
8x + 2y = -12
5x - y = 4
To solve this system, we can use the method of substitution. We solve one equation for one variable and then substitute that expression into the other equation.
- Solve the second equation for y: y = 5x - 4.
- Substitute this expression for y into the first equation: 8x + 2(5x - 4) = -12.
- Simplify and solve for x: 18x - 8 = -12.
- Find the value of x: x = -4/18 = -2/9.
- Substitute the value of x back into either of the original equations to find the value of y. Using the second equation: 5(-2/9) - y = 4. Simplifying this equation gives: y = -38/9.
- Therefore, the solution to the system of equations is x = -2/9 and y = -38/9.