We are asked to solve the following system of equations: $5x + y = 14$ $2x - y = 7$ We need to determine if the system has a solution, infinitely many solutions, or no solution. If there is a unique solution, we need to provide the ordered pair $(x, y)$.

AlgebraSystem of EquationsLinear EquationsElimination MethodSolution of Equations
2025/3/17

1. Problem Description

We are asked to solve the following system of equations:
5x+y=145x + y = 14
2xy=72x - y = 7
We need to determine if the system has a solution, infinitely many solutions, or no solution. If there is a unique solution, we need to provide the ordered pair (x,y)(x, y).

2. Solution Steps

We can solve this system of equations using the elimination method. Add the two equations together:
(5x+y)+(2xy)=14+7(5x + y) + (2x - y) = 14 + 7
7x=217x = 21
x=217x = \frac{21}{7}
x=3x = 3
Now, substitute the value of xx into the first equation to solve for yy:
5(3)+y=145(3) + y = 14
15+y=1415 + y = 14
y=1415y = 14 - 15
y=1y = -1
So, the solution is x=3x = 3 and y=1y = -1. Therefore, the ordered pair is (3,1)(3, -1).
To check the solution, substitute x=3x = 3 and y=1y = -1 into the second equation:
2(3)(1)=72(3) - (-1) = 7
6+1=76 + 1 = 7
7=77 = 7
The solution is correct.

3. Final Answer

The solution to this system is (3,1)(3, -1).

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