Question

encontre as raízes 4b+8(b+4)=6b matemática do 7 ano

Answer 1

$4b~+~8\,.\,(b+4)~=~6b\\\\\\Utilizando~a~propriedade~distributiva~da~multiplicacao:\\\\\\4b~+~8\,.\,b~+~8\,.\,4~=~6b\\\\\\4b~+~8b~+~32~=~6b\\\\\\4b~+~8b~-~6b~=~-32\\\\\\6b~=~-32\\\\\\b~=~-\frac{32}{6}\\\\\\\boxed{b~=~-\frac{16}{3}}~~~ou~~~\boxed{b~=~-5,333...}$