Question

resolva a proporçao x-2:12 igual a -x:20???
e urgente!!!!!!!!!

Answer 1

$\frac{x-2}{12}$ = $\frac{-x}{20}$

(multiplica cruzado )

20.( x - 2) = 12 ( - x )

20x - 40 = - 12x

20x + 12x = 40

32x = 40

x = 40/32 (simplifica por 8 )

x = 5/4