Question

va roggg am nevoie joi dau puncte si coroana!​

Answer 1

Răspuns:

b) x=0, 0 ∈ Z

d) x=4/2=2 => x ∈ Z

e) x= 12/3=4 => x ∈ Z

f) x=-2 =>x ∈ Z

g) x=6/2=3 =>x ∈ Z

h) x=5/5=1 => x ∈ Z

Explicație pas cu pas:

a) 8x+1=5x-5

8x-5x=5-1

3x=4 =>x=4/3 => x ∉Z

b) -4x+10=10-2x

-4x+2x=10-10

-2x=0 =>x=0, 0 ∈Z

c) -3x+5=-9x+4x

-3x+5=-5x

-3x+5x=-5

2x=-5 => x=-5/2=> x ∉Z

d) 2(x+1)=6

2x+2=6

2x=6-2

2x-4 -> x=4/2=2 => x ∈ Z

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

5x-5=2x+7

5x-2x=7+5

3x=12 =>x= 12/3=4 => x ∈ Z

f) 3(x+2)=2(x+4)

3x+6=2x+4

3x-2x=4-6

x=-2 =>x ∈ Z

g) 6=4(x+1)-2(x+2)

6=4x+4-2x-4

6=2x => x=6/2=3 =>x ∈ Z

h) 4=5(x+1)-6

4=5x+5-6

5x=4+1

5x=5 =>x=5/5=1 => x ∈ Z

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

6x-15=6x-6-9

0=0 => x ∉ Z

Sper ca te-am ajutat!