M< VGH +M<FGV = M<FGH
26x+4 +20 = 30x
26x +24 = 30x
26x-26x +24 =30x-26x
24 = 4x
24/4 = 4x/4
X = 6
Check
26(6)+4 +20 = 30(6)
156 + 4 +20 = 180
180 = 180