Question

3) Resolva a equação 25 + 15x + 18 - 6x + 28 = 13 + x + 1 + 17 e informe o conjunto solução.​

Answer 1

Olá!

$25+15x+18-6x+28=13+x+1+17\\\\15x-6x+25+18+28=13+x+1+17\\\\9x+25+18+28=13+x+1+17\\\\9x+71=13+x+1+17\\\\9x+71=x+13+1+17\\\\9x+71=x+31\\\\9x+71-71=x+31-71\\\\9x=x-40\\\\9x-x=x-40-x\\\\8x=-40\\\\\frac{8x}{8}=\frac{-40}{8}\\\\x=-5$

Espero ter ajudado, tenha boas aulas!