Question

r+t=2
r-t=7

Answer 1

1) Add both equations.
2) Solve for r.
3) Substitute the value of r with one of the equations.
4) Solve for t.

Answer 2

\(\Large \color{purple}{\rightarrow 2r = 9 }\)
\(\Large \color{purple}{\rightarrow r = 4.5 }\)

Now, solve for t.

\(\Large \color{purple}{\rightarrow 4.5 + t = 2 }\)
\(\Large \color{purple}{\rightarrow t = -2.5 }\)