Question

REPEDE VA ROGGGGGGGGGGGGGGG

Answer 1

Explicație pas cu pas:

1.

a) -4x + 1 = -15

-4x = - 16

x = -16/-4

x = 4

b) 5x - 3 = 3x + 11

5x - 3x = 11 + 3

2x = 14

x = 14/2

x = 7

c) 5(x - 1) = 2x + 7

5x - 5 = 2x + 7

5x - 2x = 7 + 5

3x = 12

x = 12/3

x = 4

d) 3(2x - 5) = 6(x - 1) - 9

6x - 15 = 6x - 6 - 9

6x - 6x = - 6 - 9 + 15

0 = - 15 + 15

0 = 0

2.

1 - [(-4) - 6 × (-2) + (-3 - 5) : 2] + 15 : (-5) =

= 1 - [(-4) + 12 - 4] + 15 : (-5) =

= 1 - 4 - 3 = - 8.