Question

Rezolvaț exercițile. a)2(x-1)=10, b)5(x-2)-2(x+3), c)4x-12=3(x+1) ,d)8x-2(x+1)=20. e)4(x-2)+12x=0 , f)2x-5=3(x+1)

Answer 1

Răspuns:

a) 2x-2=10 /-2

2x=8

x=4

b)5x-10-2x-6=3x-16

c) 4x-12=3x+3 /+12

4x=3x+15/-3x

x=15

d)8x-2x-2=20

6x-2=20/+2

6x=22

x=22/6=>x=11/3

e)4x-8+12x=0

16x-8=0/+8

16x=8

x=8/16=>x=1/2

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

2x=3x+8/-3x

-x=8

x=-8

Answer 2

Răspuns:

2*(×-1)=10

2x-2=10

2x=12

x=12:2

x=6

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

5x-10-2x-6

3x-16=

3x=16

x=16:3

x=5,3

4x-12=3(x+1)

4x-12=3x+3

4x-3x=12+3

x=15

8x-2(x+1)=20

8x-2x-2=20

6x=20+2

6x=22

x=22:6

x=3,6

4(x-2)+12x=0

4x-8+12x=0

20x-8=0

20x=8

x=8:20

x=0,4

2x-5=3(x+1)

2x-5=3x+3

2x-3x=3+5

-x=8

x=-8