60x+40*(x-0.5)

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60x+40*(x-0.5)60x+40*(x-0.5)60x+40*(x-0.5)60x+40*(x-0.5)=0100x=40*0.5=20x=0.260x+40*(x-0.5)=60x+40x-

60x+40*(x-0.5)
60x+40*(x-0.5)

60x+40*(x-0.5)
60x+40*(x-0.5)=0
100x=40*0.5=20
x=0.2

60x+40*(x-0.5)
=60x+40x-20
=100x-20.

60x+40*(x-0.5)=0
100x=40*0.5=20
x=0.2

60x+40*(x-0.5)
=60x+40x-20
=100x-20.

60x+40*(x-0.5)=60x+40x-20=100x-20