Answer:
x = 6º
Step-by-step explanation:
120º = 15(x + 2)
120 = 15x + 30
15x = 120 - 30
15x = 90
x = 90/15
x = 6º
(7^x)^4 is equal to 7^(4x).
7^2 * 7^3 is equal to 7^(2+3) which is equal to 7^5.
7^5 / 7^(3x) is equal to 7^(5 - 3x).
you wind up with 7^(4x) is equal to 7^(5 - 3x)
this is true if and only if 4x = 5 - 3x.
Cos38 = 7,8/x
X= 7,8/cos38
= 9,90