Question

tengo que hallar el valor de la incógnita de los siguientes cálculos=
3/4.(x+1/2)=1
2x+1/4=1/2x+1
(x-1/4):2=1
1/3x+2/15=2/5

Answer 1

3/4.(x+1/2)=1
3x/4+3/8=1
(6x+3)/8=1
6x+3=8
6x=8-3
6x=5
x=5/6


2x+1/4=1/2x+1
(8x+1)/4=(x+2)/2
(8x+1)/2=(x+2)
8x+1=(x+2)2
8x+1=2x+4
8x-2x=4-1
6x=3
x=3/6
x=1/3


(x-1/4):2=1
(4x-1)/8=1
4x-1=8
4x=8+1
4x=9
x=9/4

1/3x+2/15=2/5
5x/15+2/15=6/15
5x+2=6
5x=6-2
5x=4
x=4/5