Question

(x – 5)/10 + (1 – 2x)/5 = (3 – x)/4

Answer 1

$\frac{x-5}{10} + \frac{1-2x}{5}= \frac{3-x}{4} \\ MMC(10,5,4)=20 \\ 2(x-5)+4(1-2x)=5(3-x) \\ 2x-10+4-8x=15-5x \\ 2x-8x+5x=15+10-4 \\ -x=21 \\ x = -21$

Answer 2

(X-5)/10+(1-2x)/5=(3-x)/4
mmc(4,5,10)=20 ... Multiplicando por 20
2(x-5)+4(1-2x)=5(3-x)
2x-10+4-8x=15-5x
2x-8x+5x=15+10-4
-x=21
X=-21