Question 1152976
You = x
Father = 4x
<pr>
2(x + 20) = 4x + 20
<pr>
2x + 40 = 4x + 20
<pr>
20 = 2x
<pr>
x = 10
<pr>
You = x = <b>10</b>
Father = 4x = <b>40</b>