X+13=20
-9 + x=12
2x+9=15
1/3y - 3=7
7x-2=26
4x-6=30
1/5x-2=4
y-3+y=5
5x-4x+1=2
1/2x+1-x=-4 temat rozwiązywanie równań​


Odpowiedź :

Odpowiedź:

[tex]x + 13 = 20 \\ x = 20 - 13 \\ x = 7[/tex]

[tex] - 9 + x = 12 \\ x = 12 + 9 \\ x = 21[/tex]

[tex]2x + 9 = 15 \\ 2x = 15 - 9 \\ 2x = 6 \\ x = 6 \div 2 \\ x = 3 [/tex]

[tex] \frac{1}{3} y - 3 = 7 \\ \frac{1}{3} y = 7 + 3 \\ \frac{1}{3} y = 10 \\ y = 10 \times 3 \\ y = 30[/tex]

[tex]7x - 2 = 26 \\ 7x = 26 + 2 \\ 7x = 28 \\ x = 28 \div 7 \\ x = 4[/tex]

[tex]4x - 6 = 30 \\ 4x = 30 + 6 \\ 4x = 36 \\ x = 36 \div 4 \\ x = 9[/tex]

[tex] \frac{1}{5} x - 2 = 4 \\ \frac{1}{5} x = 4 + 2 \\ \frac{1}{5} x = 6 \\ x = 6 \times 5 \\ x = 30[/tex]

[tex]y - 3 + y = 5 \\ 2y - 3 = 5 \\ 2y = 5 + 3 \\ 2y = 8 \\ y = 8 \div 2 \\ y = 4[/tex]

[tex]5x - 4x + 1 = 2 \\ x + 1 = 2 \\ x = 2 - 1 \\ x = 1[/tex]

[tex] \frac{1}{2} x + 1 - x = - 4 \\ - \frac{1}{2} x + 1 = - 4 \\ - \frac{1}{2} x = - 4 - 1 \\ - \frac{1}{2} x = - 5 \\ x = ( - 5) \times ( - 2) \\ x = 10[/tex]

Odpowiedź:

X=20-13

X=7

X=12+9

X=21

2x=15-9

2x=6

X=3

1/3y=7+3

1/3y=10

Y=30

7x-2=26

7x=28

X=28:7

X=4

4x-6=30

4x=30+6

4x=36

X=36:4

X=9

1/5x-2=4

1/5x=4+2

1/5x=6

X=30

Y-3+y=5

2y=5+3

2y=8

y=4

5x-4x+1=2

X+1=2

X=2-1

X=1

1/2x+1-x=-4

-1/2x=-4-1

-1/2x=-5

X=10