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🚀 If you are a candidate and are willing to change your future, follow me on social media. ✅ YouTube / mathematicamentecomprofrobsonliers ✅ Facebook / robsonliers.professor ✅ Instagram https://instagram.com/prof.robsonlier... ✅ TikTok https://vm.tiktok.com/ZMR3ELRQy/ ✅ Kwai http://s.kw.ai/oW88fBYa If you want to help me so that the channel continues to grow, you can: ✅ Subscribe: https://bit.ly/3iFWTuW ✅ Become a channel member: https://bit.ly/3nlOiQi _________________________________________________________________ Visit my website: https://www.mathematicamente.com.br Contact for partnerships: 👉 [email protected] #Mathematics #contests SYSTEM OF EQUATIONS (Substitution and Addition) Prof Robson Liers 2 Methods - Mathematically