Question

2 x 6 = 3x
8x 5= 4x2
.
10 x 1 = ZOX
Z
9x2 = 3x6
2x 2 = 4x /
3x6 = 6x2
--*8 = 6 x _
5x3=_X​

Answer 1

Răspuns:

) 5(3x - 6) + 4(3 - 2x) = 5x - 8

   15x - 30 + 12 - 8x = 5x - 8

   15x - 8x - 5x = 30 - 12 - 8

   2x = 10

   x = 5

b) 9(x - 3 ) - 4(7 - 3x) = 5 - 3x

  9x - 27 - 28 + 12x = 5 - 3x

  9x + 12x + 3x = 27 + 28 + 5

  24x = 60

    x = 2,5

c) 2 3/8 ( 1/3 - 3x ) + 5/8 ( 1/3 - 3x ) = 1

  19/8 ( 1/3 - 3x ) + 5/8 ( 1/3 - 3x ) = 1

  19/24 - 57/8x + 5/24 - 15/8x = 1

  -72/8x + 24/24 = 1

  -9x + 1 = 1

  -9x = 0

  x = 0

d) 15-x / 6 - 2x+16 / 5 = 1

  5(15 - x ) - 6(2x + 16 ) = 30

  75 - 5x - 12x - 96 = 30

  -17x = 30 - 75 + 96

  -17x = 51

    x = -3

Explicație pas cu pas: