Question

Qual a resposta?

-3 (3x-42) = 2 (7x-52)

Answer 1

-3(3x-42)=2(7x-52)

-3*3x+3*42=2*(7x-52)

-9x+3*42=2*(7x-52)

-9x+126=2*(7x-52)

-9x+126=2*7x-2*52

-9x+126=14x-2*52

-9x+126=14x-104

-9x-14x=-104-126

-23x=-104-126

-23x=-230

x=-230/-23

x = 10

Answer 2

X=10, pois: -9x+126=14x-104 e com isso: -23x=-230 ,depois concluimos que x=10