Resposta :
Olá!
[tex]3\left(3x+7\right)+2x+2\left(5x-2\right)\\\\=9x+21+2x+2\left(5x-2\right)\\\\=9x+21+2x+10x-4\\\\=21x+17[/tex]
Espero ter ajudado, tenha boas aulas!
Olá!
[tex]3\left(3x+7\right)+2x+2\left(5x-2\right)\\\\=9x+21+2x+2\left(5x-2\right)\\\\=9x+21+2x+10x-4\\\\=21x+17[/tex]
Espero ter ajudado, tenha boas aulas!