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Question 2:
![sn1 sn2 e1 e2 practice problem 2](https://static.wixstatic.com/media/33bcb5_de2c3e8ef56841438e4641abb59fbd10~mv2.png/v1/fill/w_489,h_134,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/Substitutions%20and%20Eliminations%202.png)
Question 3:
![Substitutions and Eliminations 3.png](https://static.wixstatic.com/media/33bcb5_ea213ee3974f4aeaa8a364026d0a7f02~mv2.png/v1/fill/w_328,h_159,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/Substitutions%20and%20Eliminations%203.png)
Question 4:
![sn1 sn2 e1 e2 practice problem 4](https://static.wixstatic.com/media/33bcb5_ef4e0fe4fee3450ba30a3d94c7ef0beb~mv2.png/v1/fill/w_122,h_43,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%204.png)
Question 5:
![sn1 sn2 e1 e2 practice problem 5](https://static.wixstatic.com/media/33bcb5_7eccba0aac6c4b5f9ccbfba157e04120~mv2.png/v1/fill/w_107,h_31,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%2010.png)
Question 6:
![sn1 sn2 e1 e2 practice problem 6](https://static.wixstatic.com/media/33bcb5_b61d31ebba13450f82db072edcb359d4~mv2.png/v1/fill/w_76,h_26,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%208.png)
Question 7:
![sn1 sn2 e1 e2 practice problem 7](https://static.wixstatic.com/media/33bcb5_d37ce731d7924505a08e587599bcf640~mv2.png/v1/fill/w_91,h_43,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%205.png)
Question 8:
![sn1 sn2 e1 e2 practice problem 8](https://static.wixstatic.com/media/33bcb5_bed95a5cb1574b97894ab4027f5e2a05~mv2.png/v1/fill/w_75,h_9,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%206.png)
Question 9:
![sn1 sn2 e1 e2 practice problem 9](https://static.wixstatic.com/media/33bcb5_9f58e8cba983498294b43862ab122b17~mv2.png/v1/fill/w_108,h_41,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%207.png)
Question 10:
![sn1 sn2 e1 e2 practice problem 10](https://static.wixstatic.com/media/33bcb5_6131f77c47f443dc8a9b6a2f4f533608~mv2.png/v1/fill/w_51,h_24,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%209.png)
Question 11:
![sn1 sn2 e1 e2 practice problem 11](https://static.wixstatic.com/media/33bcb5_da22806fd973457da9540656eb53b80e~mv2.png/v1/fill/w_120,h_30,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%2011.png)
Question 12:
![sn1 sn2 e1 e2 practice problem 12](https://static.wixstatic.com/media/33bcb5_a9e9adf67fff4a77bfda4159cb954cb0~mv2.png/v1/fill/w_122,h_30,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_avif,quality_auto/Substitutions%20and%20Eliminations%2012.png)
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