TEST 9
1.
\(\left.\begin{aligned}x+y=10\\x-y=4\end{aligned}\right\}\)
\(\Rightarrow x=?\)
A) \(8\)B) \(7\)C) \(6\)D) \(4\)E) \(3\)
2.
\(\left.\begin{aligned}3x+y=11\\2x+y=8\end{aligned}\right\}\)
\(\Rightarrow y=?\)
A) \(1\)B) \(2\)C) \(3\)D) \(4\)E) \(5\)
3.
\(\left.\begin{aligned}x-y=2\\2x+3y=14\end{aligned}\right\}\)
\(\Rightarrow S.S.=\left\{\left(x,y\right)\right\}=?\)
A) \(\left\{\left(4,2\right)\right\}\)B) \(\left\{\left(3,1\right)\right\}\)C) \(\left\{\left(5,3\right)\right\}\)D) \(\left\{\left(1,3\right)\right\}\)E) \(\left\{\left(5,4\right)\right\}\)
4.
\(\left.\begin{aligned}x+y=\samefrac73\\x-y=\samefrac53\end{aligned}\right\}\)
\(\Rightarrow x=?\)
A) \(12\)B) \(8\)C) \(4\)D) \(2\)E) \(\samefrac23\)
5.
\(\left.\begin{aligned}x-y=8\\-\left(x+y\right)=6\end{aligned}\right\}\)
\(\Rightarrow x=?\)
A) \(-2\)B) \(-1\)C) \(0\)D) \(1\)E) \(2\)
6.
\(\left.\begin{aligned}5x+4y=12\\5y-5x=6\end{aligned}\right\}\)
\(\Rightarrow x=?\)
A) \(5\)B) \(\samefrac45\)C) \(\samefrac12\)D) \(-\samefrac12\)E) \(-2\)
7.
\(\left.\begin{aligned}4x+y=10\\5x-2y=6\end{aligned}\right\}\)
\(\Rightarrow\samefrac xy=?\)
A) \(1\)B) \(2\)C) \(\samefrac52\)D) \(3\)E) \(\samefrac72\)
8.
\(\left.\begin{aligned}2x-3y=17\\x+3y=10\end{aligned}\right\}\)
\(\Rightarrow y=?\)
A) \(9\)B) \(3\)C) \(\samefrac13\)D) \(0\)E) \(-1\)