Question

Resolva as equações abaixo, onde a incógnita X é um ângulo(medida em graus)
A) 2X = 90 graus
B) X + 17graus = 90 graus
C) 4X + 10 graus = 90 graus
D) X + 8 X = 90 graus
E) 5X - 20 graus = 1 grau + 2X
F) X = 2 (90 graus-X)
G) 4 (X + 3graus) = 20 graus
H) (3X - 20 graus ) + 50 graus =90 graus
I ) 3 (X+1grau) = 2 (X + 7 graus)
J ) 2X + 2(X +1 grau ) = 4 graus + 3 ( X + 2 graus)


EM NOME DE JESUS CRISTO ME AJUDEM

Answer 1

a) 2x = 90   b)x + 17 = 90   c) 4x + 10 = 90   d)x + 8x = 90   e)5x - 20 = 1 + 2x
    x = 90/2      x = 90 - 17        4x = 90 - 10        9x = 90            5x - 2x = 1 + 20
    x = 45         x = 73                x = 80/4               x = 90/9           3x = 21
                                                   x= 20                   x = 10              x = 21/3
                                                                                                         x = 7

f)x = 2 (90 - x)   g)4 (x + 3) = 20   EU ESQUECI A MATERIA DAS OUTRAS    
  x = 180 - 2x        4x + 12 = 20      
  x + 2x = 180       4x = 20 - 12 
  3x = 180             4x = 8
  x = 180/3            x = 8/4
  x = 60                  x = 2