The problem asks us to solve the following system of linear equations for $x$ and $y$: $2x + 5y = 17$ (1) $5x + 8y = 11$ (2) Then, we need to determine the solution of the system.

AlgebraLinear EquationsSystems of EquationsElimination MethodSubstitution MethodSolving Equations
2025/3/13

1. Problem Description

The problem asks us to solve the following system of linear equations for xx and yy:
2x+5y=172x + 5y = 17 (1)
5x+8y=115x + 8y = 11 (2)
Then, we need to determine the solution of the system.

2. Solution Steps

We can use the method of substitution or elimination. Let's use elimination.
Multiply equation (1) by 5 and equation (2) by 2:
5(2x+5y)=5(17)5(2x + 5y) = 5(17)
10x+25y=8510x + 25y = 85 (3)
2(5x+8y)=2(11)2(5x + 8y) = 2(11)
10x+16y=2210x + 16y = 22 (4)
Subtract equation (4) from equation (3):
(10x+25y)(10x+16y)=8522(10x + 25y) - (10x + 16y) = 85 - 22
10x+25y10x16y=6310x + 25y - 10x - 16y = 63
9y=639y = 63
y=639y = \frac{63}{9}
y=7y = 7
Now substitute y=7y = 7 into equation (1):
2x+5(7)=172x + 5(7) = 17
2x+35=172x + 35 = 17
2x=17352x = 17 - 35
2x=182x = -18
x=182x = \frac{-18}{2}
x=9x = -9
So the solution is x=9x = -9 and y=7y = 7. The ordered pair is (9,7)(-9, 7).

3. Final Answer

The solution to the system is (9,7)(-9, 7).
The answer is A. The solution to the system is (9,7)(-9, 7).

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