Respuesta :

Exact form:
1/4

Decimal form:
0.25
B is 13/12 which can be put into a mixed number as 1 1/12

Here is the shown work:
4x+(-7)/4=-2/3
4x-7/4=-2/3
3(4x-7)=4(-2)
3(4x-7)=-4 times 2
3(4x-7)=-8
3 times 4x - 3 times 7 =-8
12x-21=-8
(12x-21)+21=-8+21
12x-21+21=13
12x=13
12x/12=13/12
X=13/12