Нужно! 1) 1/2(7-2х)=3/4(8х+4 2/3) 2) 0,5(7х+8)=1,5(7х+8)

1) 1/2(7-2х)=3/4(8х+4 2/3)
3,5-х=6х+3,5
Х-6х=3,5-3,5
-5х=0
Х=0
2) 0,5(7х+8)=1,5(7х+8)
3,5х+4=10,5х+12
3,5х-10,5х=12-4
-7х=8
Х=8:(-7)=-1 1/7

1)7-2x=3/2*(8x+4 2/3)
7-2x=3/2*(8x+14/
7-2x=12x+7
-2x=12x
-2x-12x=0
-14x=0
x=0

2)0,5(7х+8)=1,5(7х+8)
0,5(7x+8)-1,5(7x+8)=0
(0,5-1,5)*(7x+8)=0
-1(7x+8)=0
7x+8=0
7x=-8
x=1 1/7