Answer:
9
Step-by-step explanation:
In a equilateral triangle all angles are equal and 60° each so
7x - 3 = 60° ➡ 7x = 63° ➡ x = 9
Answer:
divide both sides by 1m
u2-v2=T/1m
add -u2 both sides of the equation
-v2=T/1m -u2
divide both sides by -1
v2= u2 - T/1m