Question

alguém sabe responder essa por favor?​

Answer 1

$\frac{120 - ( - 20)}{x - 20)} = \frac{10 0 - 0}{x - 0}$

$140x = 100x \times - 2000 \\ 2000 = - 140x+ 100x \\ 2000 = 40x \\ \frac{2000}{40} = x \\ 50 = x$