Question

Va rog cat mai repede​

Answer 1

Explicație pas cu pas:

1. a) x+7= -10

x= -17

b) 2x-8= -20

2x= -12

x= -6

c) -3x+9= -27

-3x= -36

3x=36

x=12

d) -15x-13= -7x+11

-8x=24

x= -3

e) -13-x+5= -143

-8-x= -143

-x= -135

x= 135

f) 5(x+3)=2(5x-5)

5x+15=10x-10

-5x= -25

5x=25

x=5

2. a) -7x<42

7x> -42

x> -6

x= ( -6, +♾)

b)2x-4< -18

2x< -14

x< -7

x= (-♾,-7)

c) -5(x+1)> -15

5(x+1) <15

x+1<3

x<2

x= (-♾,2)