Which shapes contain at least one right angle? Select each correct answer.
2 answers:
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-4n + 7 + 2n = 1
First, simplify -4n + 7 + 2n to -2n + 7. / Your problem should look like: -2n + 7 = 1
Second, subtract 7 from both sides. / Your problem should look like: -2n = 1 - 7
Third, simplify 1 - 7 to -6. / Your problem should look like: -2n = -6
Fourth, divide both sides by -2. / Your problem should look like: n =
Fifth, simplify
to 
/ Your problem should look like: n = 
Sixth, simplify to 3. / Your problem should look like: n = 3
Answer: n = 3 (B)
First, simplify -4n + 7 + 2n to -2n + 7. / Your problem should look like: -2n + 7 = 1
Second, subtract 7 from both sides. / Your problem should look like: -2n = 1 - 7
Third, simplify 1 - 7 to -6. / Your problem should look like: -2n = -6
Fourth, divide both sides by -2. / Your problem should look like: n =
Fifth, simplify
Sixth, simplify
Answer: n = 3 (B)