20% of 120 is 24 less than four fifths of a number. What's the number? Solve the equation

20% of 120 is 24 less than four fifths of a number. What's the number? Solve the equation

Let this number be X
120×20%+24=4/5X
24+24=0.8X
48=0.8X
X=48÷0.8
X=60
A: the number is 60
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