Question

dau coroana va rog mult ! tot ce scrie acolo​

Answer 1

Răspuns:

x+2=9

x=9-2

x=7

3x-1=8

3x=8+1

3x=9

x=9÷3

x=3

4x-9=3

4x=3+9

4x=12

x=12÷4

x=3

5x-9=1

5x= 1+9

5x=10

x=10÷5

x=2

3-2x=7

-2x=7-3

-2x=4

x= 4÷(-2)

x= -2

2-x=8

-x=8-2

-x=6

x=6÷(-1)

x=-6

4=x-2

x=4+2

x=6

3x+1=10

3x=10-1

3x=9

x=9÷3

x=3

7x+15=1

7x=1-15

7x=-16

x=-16:7

x=-2,285

3-4x=15

-4x=15-3

-4x=12

x=12÷(-4)

x=-3

x+3=1

x=1-3

x=-2

7-2x=9

-2x=9-7

-2x=2

x=2÷(-2)

x=-1

Answer 2

Răspuns:

V,11

4(x+1)-3=3(x-1)+7

4x+4-3=3x-3+7

4x+1=3x+4

4x-3x=4-1

x=3

12

5(4x+3)+7=3(x+2)-1

20x+15+7=3x+6-1

20x+22=3x+5

20x-3x=5-22

17x= -17

x= -1

Explicație pas cu pas: