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7 − (3 − 5x) = 2x − (4x + 3)





2x + 5 − 2(4x − 2) = 10 − (5x − 23)

2x + 3 − (6 − 5x) = 3x + 7

Odpowiedź :

Lea3go

[tex]7 - (3 - 5x) = 2x - (4x + 3)[/tex]

[tex]7 - 3 + 5x = 2x - 4x - 3[/tex]

[tex]5x - 2x + 4x = - 7[/tex]

[tex]7x = - 7[/tex]

[tex]x = - 1[/tex]

[tex]2x + 5 - 2(4x - 2) = 10 - (5x - 23) [/tex]

[tex]2x + 5 - 8x + 4 = 10 - 5x + 23[/tex]

[tex]2x - 8x + 5x = 23 + 10 - 4 - 5[/tex]

[tex] - x = 24[/tex]

[tex]x = - 24[/tex]

[tex]2x + 3 - (6 - 5x) = 3x + 7[/tex]

[tex]2x + 3 - 6 + 5x = 3x + 7[/tex]

[tex]2x + 5x - 3x = 7 - 3 + 6[/tex]

[tex]4x = 10[/tex]

[tex]x = \frac{10}{4} = 2 \frac{1}{2} [/tex]

Wojciechfil20go

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

7 - 3 + 5x = 2x - 4x - 3

4 + 5x = -2x - 3

7x = -7

x = -1

2x + 5 -2(4x - 2) = 10 - (5x - 23)

2x + 5 -8x + 4 = 10 - 5x + 23

-6x + 9 = -5x + 33

-x = 24

x -24

2x + 3 -(6 - 5x) = 3x + 7

2x + 3 - 6 + 5x = 3x + 7

7x -3 = 3x + 7

4x = 10

x = 2,5

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