Question

resolva as equaçoes (x - 5)/10 + (1 - 2x)/5 = (3 - x)/4

Answer 1

$\dfrac{x-5}{10} + \dfrac{1-2x}{5} = \dfrac{3-x}{4}\to~~~~ mmc(10,5,4)=20\\\\\\ (2x-10)+ (4-8x)=(15-5x)\to\\\\ 2x-10+4-8x=15-5x\to\\\\ 2x-8x+5x=15+10-4\to\\\\-x=21.(-1)\to\\\\ \underline{x=-21} \\\\\\ \large\boxed{S=\{-21\}}$