Question

determine o valor de x na proporçao ;

2x+4/x-7 = 1/2

b) 1/3x = 2/x-1

Answer 1

a) $2(2x+4)=x-7 \\ 4x+8=x-7 \\ 4x-x=-7-8 \\ 3x=-15 \\ x= \frac{-15}{3} \\ x=-5$

b) $6x=x-1 \\ 6x-x=-1 \\ 5x=-1 \\ x=- \frac{1}{5}$