Ответ:

Пошаговое объяснение:

a)

9*(x - 4) = 9*45 + 5*(2+4x)

9x - 36 = 405 + 10 + 20x

9x - 36 = 415 + 20x

20x - 9x = -36 - 415

11x = -451

x = -451 : 11

x = -41

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б)

2*20 - 5*(3x - 7) + 4*(x + 17) = 20*0

40 - 15x + 35 + 4x + 68 = 0

143 - 11x = 0

11x = 143

x = 143:11

x = 13

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в)

8 - y + 2*(5 - 4y) = 3*(y + 6)

8 - y + 10 - 8y = 3y + 18

18 - 9y = 3y + 18

3y + 9y = 18 - 18

12y = 0

y = 0

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г)

2*(4x + 7) + 5*(3x - 2) - 5*(5x - 2) = 32*10

8x + 14 + 15x - 10 - 25x + 10 = 320

-2x + 14 = 320

-2x = 320 - 14

-2x = 306

x = -306:2

x = -153

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д)

6*(9x - 5) - 4*(3 + 5x) - 3*(8x - 2) = 2*12

54x - 30 - 12 - 20x - 24x + 6 = 24

10x -36 = 24

10x = 24+36

10x = 60

x = 60:10

x = 6

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e)

3*(4x - 3) - 2*(5 - 2x) = 2*(3x - 4)

12x - 9 - 10 + 4x = 6x - 8

16x - 19 = 6x - 8

16x - 6x = 19 - 8

10x = 11

x = 11 : 10

x = 1,1

Verified answer