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Anonymous
-20 = -4x - 6x-20 = -10x20 = 10x2 = x
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k is the variable.
20
math order operation is : x : + - so: 6-4x6x-8x2 = 6 - [4 x 6 x (-8) x 2] = 6 - (-384) = 390
No, it is an equation. n+6 is an expression.