Augmented subtraction error. HELP!

Here’s my answer for this exercise:

a -= 5;
b -= -6;
c -= 2;

WHAT AM I DOING WRONG?! This is driving me crazy.

Thanks!


var a = 11;
var b = 9;
var c = 3;

// Only change code below this line
a = a - 6;
b = b - 15;
c = c - 1;

a -= 5;
b -= -6;
c -= 2;

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Challenge: Compound Assignment With Augmented Subtraction

Link to the challenge:

This :point_up_2: (extra -)