Olá!
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[tex]{ \large \displaystyle \sf {b) \: 6x - 1 = 5x + 1}}[/tex]
[tex]{ \large \displaystyle \sf {6x - 5x = 1 + 1}}[/tex]
[tex]{ \green{ \boxed{ \boxed{ \pink{{ \large \displaystyle \sf {x = 2}}}}}}} \\ \\ \\ [/tex]
[tex]{ \large \displaystyle \sf {c) \: 8 + 12 = x}}[/tex]
[tex]{ \large \displaystyle \sf {20 = x}}[/tex]
[tex]{ \green{ \boxed{ \boxed{ \pink{{ \large \displaystyle \sf {x = 20}}}}}}} \\ \\[/tex]
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Espero ter ajudado! ❤️
