Wymyśl 10 dowolnych równań z 1 niewiadomą i rozwiąż Proszę że by były takie śrdnie dam naj.Klasa 2 g.... Question from @bartekania7

ViolencePL

a. x + 20 = 35

x = 35 - 20

x = 15

b. 2y + 35 = 45

2y = 45 - 35

2y = 10

y = 5

c. 4z - 7 = 5

4z = 5+7

4z = 12

z = 3

d. 16 + 8x/2 = 10

16 + 4x = 10

4x = 10 -16

4x = -6

x = -1,5

e. 5 ^ 2 * x = 125

25x = 125

x = 5

f. 10k - 25/5 = 7

10k - 5 =7

10k = 5+7

10k = 12

k = 1,2

g.12b - 4 = 20

12b = 24

b = 2

h.23+[2^3-1] = x

30 = x

x = 30

i.15x/5 = 15

3x = 15

x = 5

j.256x/2^6 = 32

256x/64 = 32

4x = 32

x = 8

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UniQue123

1. $(x - 5)(x + 5) + 7x = x^{2} + 3\\ x^{2} - 25 + 7x = x^{2} + 3\\ 7x = 28\\ x = 4$

2. $(x-2)^{2} - (x+2)^{2} = -5(x + 3)\\ x^{2} - 4x + 4 - x^{2} - 4x - 4 = -5x - 15\\ -8x = -5x - 15\\ -3x = -15\\ x = 5$

3. $2(x - 12) + (x - 12)(x + 12) = (x -5)(x+5)\\ 2x - 24 + x^{2} - 144 = x^{2} - 25\\ 2x = 143\\ x = 71,5$

4. $2[3x - 18(3x - 9)(3x + 9)] = -324(x^{2} +1)\\ 2[3x - 18(9x^{2} - 81)] = -324x^{2} - 324\\$

$2[3x - 162 x^{2} + 1458]= -324x^{2} - 324\\ 6x - 324x^{2} + 2916 = -324x^{2} - 324\\ 6x = -3240\\ x = - 540$

5. $2[(x - 7)(x + 7)] + 7x = 2x^{2} - 14\\ 2x^{2} - 98 + 7x = 2x^{2} - 14\\ 7x = 84\\ x = 12$

6. $\frac{3x - 11(2x - 57)}{8} = 2x - \frac{3}{8}\\ \frac{3x - 22x + 627}{8} = 2x - \frac{3}{8}\\ \frac{-19 x + 627}{8} = 2x - \frac{3}{8}\\ -19x + 627 = 16x - 3\\ -35x = -630\\ x = 18$

7. $2[x - 15(10 - 12x)] = 62\\ 2(x - 150 + 180x) = 62\\ 2(181x - 150) = 62\\ 362 x - 300 = 62\\ 362 x = 362\\ x = 1$

8. $(x-3)^{2} - (x+3)^{2} = -4(x + 10)\\ x^{2} - 6x + 9 - x^{2} - 6x - 9 = -4x - 40\\ -12x = -4x - 40\\ -8x = -40\\ x = 5$

9. $3(x - 11) + (x - 11)(x + 11) = (x -2})(x+2)\\ 3x - 33 + x^{2} - 121 = x^{2} - 4\\ 3x = 150\\ x = 50$

10. $3[x - 12(5 - 6x)] = 256\\ 3(x - 60 + 72x) = 256\\ 3(73x - 60) = 256\\ 219x - 180 = 256\\ 219 x = 438\\ x = 2$

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