Question

6-3·(2x+5)=4x-14 pf ajudem e para amanhã e vale nota

Answer 1

Equação do 1º: Aplicar a distributiva

$\mathtt{6 -3~.~(2x + 5) = 4x - 14} \\ \mathtt{6 - 6x - 15 = 4x - 14} \\ \mathtt{- 6x + 6 - 15 = 4x -14} \\ \mathtt{- 6x -9 = 4x - 14} \\ \mathtt{- 6x - 4x = -14 + 9} \\ \mathtt{- 10x = -5~~~~(-1)} \\ \mathtt{10x = 5} \\ \\ \mathtt{x = \dfrac{5}{10}~~~(\div 5)} \\ \\ \mathtt{x = \dfrac{1}{2}} \\ \\ \boxed{\boxed{\mathtt{Resposta: \dfrac{1}{2}}}}$