Question

ajutor VA ROGGGGGGGG​

Answer 1

Răspuns:

Explicație pas cu pas:

2x - 3 = 1

2x = 1 + 3 = 4

x = 4 : 2 = 2

_____________

5 - 3x = -1

3x = 5 + 1 = 6

x = 6 : 3 = 2

_____________

13 = 3x - 4

3x = 13 - 4 = 9

x = 9 : 3 = 3

_____________

-27 = 6x - 3

6x = -27 + 3 = -24

x = -24 : 6 = -4

_____________

5(x - 8) = 4x - 39

5x - 40 = 4x - 39

5x - 4x = 40 - 39

x = 1

____________

-4 + 3(x + 5) = 10

-4 + 3x + 15 = 10

3x + 11 = 10

3x = 10 - 11

3x = -1

x = -1/3 ∉ Z

________________

2(x - 1) = 3(x + 4)

2x - 2 = 3x + 12

3x - 2x = -2 - 12

x = -14

Answer 2

a) 2x-3=1

2x=3+1

2x=4

x=4:2

x=2

b) 5-3x= -1

3x=5-(-1)

3x=6

x=6:3

x=2

c) 13=3x-4

3x=13+4

3x=17

x=17/3∉Z⇒ x∈∅

d) -27=6x-3

6x= -27+3

6x= -24

x= -24:6

x= -4

e) 5(x-8)=4x-39

5x-40=4x-39

5x-4x= -39+40

x=1

f) -4+3(x+5)=10

-4+3x+15=10

3x+11=10

3x=10-11

3x= -1

x= -1/3∉Z⇒ x∈∅

g) 2(x-1)=3(x+4)

2x-2=3x+12

2x-3x=12+2

-x=14

x= -14