Test 15
1.
\(|x+1|=7\)
\(\Rightarrow\text{S.S.}=?\)
A) \(\left\{6,-6\right\}\)B) \(\left\{6,8\right\}\)C) \(\left\{8,-6\right\}\)D) \(\left\{6,5\right\}\)E) \(\left\{6,-8\right\}\)
2.
\(|2x-1|=15\)
\(\Rightarrow\text{S.S.}=?\)
A) \(\left\{8\right\}\)B) \(\left\{8,-7\right\}\)C) \(\left\{7,-8\right\}\)D) \(\left\{8,-8\right\}\)E) \(\left\{5,-8\right\}\)
3.
\(|2x+3|=7\)
\(\Rightarrow\text{S.S.}=?\)
A) \(\left\{-5,2\right\}\)B) \(\left\{-5,5\right\}\)C) \(\left\{2,5\right\}\)D) \(\left\{-2,5\right\}\)E) \(\left\{-2,-5\right\}\)
4.
\(|x-3|+|x+y-5|=0\)
\(\Rightarrow x\cdot y=?\)
A) \(15\)B) \(12\)C) \(8\)D) \(6\)E) \(3\)
5.
\(\left|\samefrac{x-3}{4}\right|=3\)
\(\Rightarrow\text{S.S.}=?\)
A) \(\left\{7,15\right\}\)B) \(\left\{-9,-15\right\}\)C) \(\left\{-9,15\right\}\)D) \(\left\{-9,9\right\}\)E) \(\left\{-15,9\right\}\)
6.
\(\left|\samefrac{7x-4}{3}\right|=0\)
\(\Rightarrow\text{S.S.}=?\)
A) \(\left\{\samefrac{4}{7}\right\}\)B) \(\left\{0\right\}\)C) \(\left\{1\right\}\)D) \(\varnothing\)E) \(\mathbb{R}\)
7.
\(|3x-1|+|x-7|=0\)
\(\Rightarrow\text{S.S.}=?\)
A) \(\left\{7\right\}\)B) \(\left\{-\samefrac{1}{3}\right\}\)C) \(\left\{-\samefrac{1}{3},7\right\}\)D) \(\mathbb{R}\)E) \(\varnothing\)
8.
\(\left|\samefrac{2x+3}{5}\right|=7\)
\(\Rightarrow\text{S.S.}=?\)
A) \(\left\{16,-19\right\}\)B) \(\left\{16,-16\right\}\)C) \(\left\{19,13\right\}\)D) \(\left\{13,-5\right\}\)E) \(\left\{21,30\right\}\)