Question:
Find all systems of linear equations with variables $a$ and $b$ such that $a-b=3$.
Project ID:
7400320167
Answer 1:
$$
\begin{aligned}
2a+b & =9 \cr
a-2b & = 2
\end{aligned}
$$
Answer 1 Correct:
1
Answer 2:
$$
\begin{aligned}
a+2b & =-3 \cr
2a+b &=0
\end{aligned}
$$
Answer 2 Correct:
1
Answer 3:
$$
\begin{aligned}
2a-b&= 3 \cr
a+b & = -3
\end{aligned}
$$
Answer 3 Correct:
1
Answer 4:
$$
\begin{aligned}
2a+b&= 2 \cr
a-2b &= 6
\end{aligned}
$$
Answer 4 Correct:
0
Answer 5:
$$
\begin{aligned}
a+2b&=-1 \cr
2a+b &=1
\end{aligned}
$$
Answer 5 Correct:
0
Answer 6:
$$
\begin{aligned}
2a-b & = 5 \cr
a+b &= 4
\end{aligned}
$$
Answer 6 Correct:
0
Answer 7 Correct:
0
Answer 8 Correct:
0