Question

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

Answer 1

x/1 - 5/10 + ( 1 - 2x)/5 = ( 3 - x )/4
mmc = 20
20x - 10 + 4( 1 - 2x) = 5 ( 3 - x )
20x - 10 + 4 - 8x = 15 - 5x
20x - 8x + 5x = 15 + 10 - 4 
17x  = 21
x = 21/17 *****

Answer 2

Olá,

x - 5/10 + (1-2x)/5 = (3-x)/4
x - 1/2 + (1-2x)/5 = (3-x)/4
(10x-5+2(1-2x)/10 = (3-x)/4
(10x-5+2-4x)/10 = (3-x)/4
(6x-3)/10 = (3-x)/4
4(6x-3) = 10(3-x)
24x-12 = 30-10x
24x+10x = 30+12
34x = 42
x = 42/34
x = 21/17