y+1=2x
x=-3
find y
You asked:
Solve the equations \[\begin{aligned}y + 1 &= 2 x\\x &= -3\end{aligned}\] for the unknown \(y\).
MathBot Answer:
The system of linear equations has exactly one solution.
\[y = -7\]
Solve \(y + 1 = 2 x\) for \(x\). \[x = \frac{y}{2} + \frac{1}{2}\]
Substitute \(\frac{y}{2} + \frac{1}{2}\) for \(x\) in \(x = -3\) and simplify. $$\begin{aligned}x &= -3 \\ \left(\frac{y}{2} + \frac{1}{2}\right) &= -3 \\ y &= -7 \end{aligned}$$
Use substitution of the numerical value of \(y\) to get the values of \(x\). $$\begin{aligned}x &= \frac{y}{2} + \frac{1}{2} \\ x &= - \frac{7}{2} + 1 \cdot \frac{1}{2} \\ x &= -3\end{aligned}$$