ABS

What is the value of
∣∣−81∣−∣−90∣∣||-81|-|-90||
?

Result

x =  9

Solution:

x=∣∣−81∣−∣−90∣∣=∣81−90∣=∣−9∣=9x = ||-81|-|-90|| = |81-90| = |-9| = 9

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