How many possibly outcomes of flipping a coin four times?

Reasoning:

There are 2 outcomes if you flip only one coin (H or T).

There are 2^2 = 2*2 = 4 outcomes if you flip two coins (HH, HT, TH, TT).

There are 2^3 = 2*2*2 = 8 outcomes if you flip three coins.

There are 2^4 = 2*2*2*2 = 16 outcomes if you flip four coins.

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step-by-step explanation:

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0