Question

(1/4+2/3x) / (1+9/20) =1
quanto vale o x?

Answer 1

(1/4+2/3x) / (1+9/20) =1 
(0,25 +2/3x) / (1+0,45) =1
(0,25+2/3x) / 1,45 = 1
0,25+2/3x = 1x1,45
2/3x=1,45-0,25
2/3x=1,20
x=1,20/(2/3)
x=(1,2x3) / 2
x=3,6/2
x=1,8