We are given a system of two linear equations with two variables, $x$ and $y$: $4x - 5y = -10$ $7x - 5y = 5$ We need to find the values of $x$ and $y$ that satisfy both equations.
2025/4/2
1. Problem Description
We are given a system of two linear equations with two variables, and :
We need to find the values of and that satisfy both equations.
2. Solution Steps
We can use the elimination method to solve the system of equations. Since the coefficient of is the same in both equations (), we can subtract the first equation from the second equation to eliminate .
Equation 1:
Equation 2:
Subtracting Equation 1 from Equation 2:
Divide both sides by 3 to solve for :
Now that we have the value of , we can substitute it into either Equation 1 or Equation 2 to solve for . Let's use Equation 1:
Subtract 20 from both sides:
Divide both sides by to solve for :
Therefore, the solution to the system of equations is and .