Question

Calcule o valor de X nas equaçoes de 1 grau

a]5+8=4x-3
b}9{5x+4}=6{7x-6}
c}3x+2=x -4
   4       5

Answer 1

Ola

a)

5 + 8 = 4x - 3

4x = 5 + 8 + 3
4x = 16 
x = 4

b)

9*(5x + 4) = 6*(7x - 6)

45x + 36 = 42x - 36
45x - 42x = -36 - 36

3x = -72
x = -72/3 = -24 

c) 

(3x + 2)/4 = (x - 4)/5

5*(3x + 2) = 4*(x - 4)

15x + 10 = 4x - 16 

15x - 4x = -16 - 10

11x = -26

x = -26/11