x+y=20
x+z=24
You asked:
Solve the system of equations:\[\begin{aligned}x + y &= 20\\x + z &= 24\end{aligned}\]
MathBot Answer:
The system of equations has infinitely many solutions.
$$\begin{aligned}x &= 24 - z\\y &= z - 4\end{aligned}$$
\(z\) is a free variable.