We are given a system of two linear equations with two variables, $v$ and $w$: $2v + 6w = -36$ $5v + 2w = 1$ We need to find the values of $v$ and $w$ that satisfy both equations.

AlgebraLinear EquationsSystems of EquationsElimination MethodSolving EquationsVariables
2025/3/12

1. Problem Description

We are given a system of two linear equations with two variables, vv and ww:
2v+6w=362v + 6w = -36
5v+2w=15v + 2w = 1
We need to find the values of vv and ww that satisfy both equations.

2. Solution Steps

We can use the elimination method to solve this system of equations. First, we multiply the first equation by 1 and the second equation by -3 to eliminate the ww variable:
Equation 1: 2v+6w=362v + 6w = -36
Equation 2: 5v+2w=15v + 2w = 1
Multiply Equation 1 by 1:
1(2v+6w)=1(36)1(2v + 6w) = 1(-36)
2v+6w=362v + 6w = -36
Multiply Equation 2 by -3:
3(5v+2w)=3(1)-3(5v + 2w) = -3(1)
15v6w=3-15v - 6w = -3
Now add the modified equations:
(2v+6w)+(15v6w)=36+(3)(2v + 6w) + (-15v - 6w) = -36 + (-3)
2v15v+6w6w=392v - 15v + 6w - 6w = -39
13v=39-13v = -39
Divide by -13 to solve for vv:
v=3913v = \frac{-39}{-13}
v=3v = 3
Now that we have the value of vv, we can substitute it back into either of the original equations to solve for ww. Let's use the second equation:
5v+2w=15v + 2w = 1
5(3)+2w=15(3) + 2w = 1
15+2w=115 + 2w = 1
2w=1152w = 1 - 15
2w=142w = -14
w=142w = \frac{-14}{2}
w=7w = -7
Thus, v=3v = 3 and w=7w = -7.

3. Final Answer

The solution is v=3v = 3 and w=7w = -7.

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