Question

Queria saber a resposta da questão (4)!!!!!

Answer 1

dndbrbrbvrbssnd sssss

Answer 2

4 ) 2 / 3 ( 90 - x ) + 1 / 5 ( 180 - x ) = 70
( 180 - 2x )/ 3 + ( 180 - x ) / 5 = 70
5( 180 - 2x ) + 3( 180 - x ) = 1050
900 - 10x + 540 - 3x = 1050
- 13x = 1050 - 900 - 540
- 13x = 150 - 540
- 13x = -390 ( inverter os sinais )
13x = 390
x = 390 / 13
x = 30°