QUESTION IMAGE
Question
- what is the value of y in the solution to the system of equations shown? \
$$\begin{cases} y = 3x - 1 \\\\ y = -x - 5 \\end{cases}$$
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Step1: Igualar las dos ecuaciones
Dado que ambas ecuaciones están en términos de \( y \), podemos igualarlas: \( 3x - 1 = -x - 5 \)
Step2: Resolver para \( x \)
Agregar \( x \) a ambos lados: \( 3x + x - 1 = -5 \) → \( 4x - 1 = -5 \)
Agregar 1 a ambos lados: \( 4x = -5 + 1 \) → \( 4x = -4 \)
Dividir por 4: \( x = \frac{-4}{4} = -1 \)
Step3: Sustituir \( x \) en una ecuación para \( y \)
Usar \( y = 3x - 1 \) con \( x = -1 \): \( y = 3(-1) - 1 = -3 - 1 = -4 \)
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\( -4 \)