We are given a system of two linear equations with two variables, $x$ and $y$: $4x + y = 14$ $x + 5y = 13$ We need to find the values of $x$ and $y$ that satisfy both equations.

AlgebraLinear EquationsSystems of EquationsSubstitution Method
2025/6/26

1. Problem Description

We are given a system of two linear equations with two variables, xx and yy:
4x+y=144x + y = 14
x+5y=13x + 5y = 13
We need to find the values of xx and yy that satisfy both equations.

2. Solution Steps

We can solve this system of equations using the substitution or elimination method. Let's use the substitution method.
From the first equation, we can express yy in terms of xx:
y=144xy = 14 - 4x
Now, substitute this expression for yy into the second equation:
x+5(144x)=13x + 5(14 - 4x) = 13
x+7020x=13x + 70 - 20x = 13
19x=1370-19x = 13 - 70
19x=57-19x = -57
x=5719x = \frac{-57}{-19}
x=3x = 3
Now that we have the value of xx, we can substitute it back into the expression for yy:
y=144x=144(3)=1412=2y = 14 - 4x = 14 - 4(3) = 14 - 12 = 2
Thus, y=2y = 2.
We can check our solution by substituting x=3x=3 and y=2y=2 into both original equations:
4(3)+2=12+2=144(3) + 2 = 12 + 2 = 14, which is correct.
3+5(2)=3+10=133 + 5(2) = 3 + 10 = 13, which is also correct.

3. Final Answer

x=3x = 3
y=2y = 2

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