We are given a system of two linear equations with two variables, $x$ and $y$: $\frac{x}{2} + \frac{y}{3} = 5$ $2x - y = -1$ We need to find the values of $x$ and $y$ that satisfy both equations.

AlgebraLinear EquationsSystems of EquationsSolving EquationsSubstitution Method
2025/4/3

1. Problem Description

We are given a system of two linear equations with two variables, xx and yy:
x2+y3=5\frac{x}{2} + \frac{y}{3} = 5
2xy=12x - y = -1
We need to find the values of xx and yy that satisfy both equations.

2. Solution Steps

First, let's eliminate the fractions in the first equation. Multiply the entire first equation by 6, the least common multiple of 2 and 3:
6(x2+y3)=6(5)6(\frac{x}{2} + \frac{y}{3}) = 6(5)
3x+2y=303x + 2y = 30
Now we have the following system of equations:
3x+2y=303x + 2y = 30
2xy=12x - y = -1
Next, we can solve for yy in the second equation:
y=2x+1y = 2x + 1
Substitute this expression for yy into the first equation:
3x+2(2x+1)=303x + 2(2x + 1) = 30
3x+4x+2=303x + 4x + 2 = 30
7x+2=307x + 2 = 30
7x=287x = 28
x=4x = 4
Now that we have the value of xx, we can find the value of yy using the equation y=2x+1y = 2x + 1:
y=2(4)+1y = 2(4) + 1
y=8+1y = 8 + 1
y=9y = 9

3. Final Answer

x=4x = 4 and y=9y = 9.