Step-by-step explanation:

Answer:
x = 12
Step-by-step explanation:
The diagram shows an equilateral triangle (because all angles are congruent). All sides in equilateral triangle are congruent, so

Solve the equation

Check this value:

Thus, 
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Answer:
g ≥ -4
Step-by-step explanation:
3 ≤ 7 + g
3 - 7 ≤ 7 - 7 + g
-4 ≤ g
g ≥ -4