We are given a system of two linear equations with two variables $x$ and $y$: $(m+1)x - my = 4$ $3x - 5y = m$ We are also given that $m = 2$. We need to solve this system for $x$ and $y$.

AlgebraLinear EquationsSystems of EquationsSolving EquationsSubstitution Method
2025/5/26

1. Problem Description

We are given a system of two linear equations with two variables xx and yy:
(m+1)xmy=4(m+1)x - my = 4
3x5y=m3x - 5y = m
We are also given that m=2m = 2. We need to solve this system for xx and yy.

2. Solution Steps

First, substitute m=2m = 2 into the equations:
(2+1)x2y=4(2+1)x - 2y = 4
3x5y=23x - 5y = 2
This simplifies to:
3x2y=43x - 2y = 4
3x5y=23x - 5y = 2
Now we have the system:
3x2y=43x - 2y = 4 (1)
3x5y=23x - 5y = 2 (2)
We can subtract equation (2) from equation (1) to eliminate xx:
(3x2y)(3x5y)=42(3x - 2y) - (3x - 5y) = 4 - 2
3x2y3x+5y=23x - 2y - 3x + 5y = 2
3y=23y = 2
y=23y = \frac{2}{3}
Now, substitute y=23y = \frac{2}{3} into equation (1):
3x2(23)=43x - 2(\frac{2}{3}) = 4
3x43=43x - \frac{4}{3} = 4
3x=4+433x = 4 + \frac{4}{3}
3x=123+433x = \frac{12}{3} + \frac{4}{3}
3x=1633x = \frac{16}{3}
x=16313x = \frac{16}{3} \cdot \frac{1}{3}
x=169x = \frac{16}{9}

3. Final Answer

x=169x = \frac{16}{9}
y=23y = \frac{2}{3}

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