100x=80*(72-x)

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100x=80*(72-x)100x=80*(72-x)100x=80*(72-x)100x=80*(72-x)100x=5760-80x100+80x=5760x=5760÷180x=32

100x=80*(72-x)
100x=80*(72-x)

100x=80*(72-x)
100x=80*(72-x)
100x=5760-80x
100+80x=5760
x=5760÷180
x=32