Question

dau coroana, problema de clasa a 9-a

Answer 1

Răspuns:

3x=21

x=7

x+1=1

x=1-1=0

x-3=24

x=24+3=27

3x+1-5=3-1-x

3x-4=2-x

3x+x=2+4

4x=6

x=6/4=3/2

x+2/3=x+1/2

x+2/3-x-1/2=0

2x+4-3x-3=0

-x= - 1

x= 1

Explicație pas cu pas:

Answer 2

3x=21

x=21:3

x=7

x+1=1/2

x+2/2=1/2

x=-1/2

x-3=24

x=24+3

x=27

3(x+1)-5=3-(1+x)

3x+3=3-1-x

3x+3=2-x

4x=-1

x=-1/4

(x+2)/3=(x+1)/2

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

2x+4=3x+3

4-3=3x-2x

1=x

x=1

Succes!