Question

resolva as equações.

a-10-2x =3x
b-x- 3= 6 + 4x
c-( 7x -8 ).2=6.(3x -4)
d-16x -6- 7x =15 + 2x

Answer 1

a) 10 - 2x = 3x
    10 - 2x - 3x = 0
    10 - 5x = 0
    10 = 5x
    x = 10 / 5
    x = 2

b) x - 3 = 6 + 4x
    x - 3 - 6 - 4x = 0
    x - 4x - 3 - 6 = 0
    -3x - 9 = 0
    -3x = 9
    x = 9 / -3
    x = -3

c) (7x - 8) . 2 = 6 (3x - 4)
    14x - 16 = 18x - 24
    14x - 16 - 18x + 24 = 0
    14x - 18x - 16 + 24 = 0
    -4x + 8 = 0
    -4x = -8
    x = -8 / -4
    x = 2

d) 16x - 6 - 7x = 15 + 2x
    16x - 6 - 7x - 15 - 2x = 0
    16x - 7x - 2x - 6 - 15 = 0
    7x - 21 = 0
    7x = 21
    x = 21 / 7
    x = 3

Espero ter ajudado. Valeu!