5 (3-2y) - 4 (9-y) = 3 (y+5)

9 (3x-7) + 3 (8x-11) = 3 (9x+8)

Question

Математика

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13 июня, 05:19

5 (3-2y) - 4 (9-y) = 3 (y+5)

9 (3x-7) + 3 (8x-11) = 3 (9x+8)

+3

Ответы (2)

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Эмуня · Answer 1

1) 5 (3-2y) - 4 (9-y) = 3 (y+5)

15-10y-36-4y=3y+15

10y-4y-3y=-15+36+15

3y=36

y=36:3

y=12

2) 9 (3x-7) + 3 (8x-11) = 3 (9x+8)

27x-63+24x-33=27x+24

27x+24x-27x=63+33+24

24x=120

x=120:24

x=5

Миля · Answer 2

5 (3-2y) - 4 (9-y) = 3 (y+5)

15-10y-36+4y=3y+15

-6y-3y=15-15+36

-9y=36

y=-4

9 (3x-7) + 3 (8x-11) = 3 (9x+8)

27x-63+24x-33=27x+24

24x=24+96

24x=120

x=5

5 (3-2y) - 4 (9-y) = 3 (y+5)9 (3x-7) + 3 (8x-11) = 3 (9x+8)

5 (3-2y) - 4 (9-y) = 3 (y+5)

9 (3x-7) + 3 (8x-11) = 3 (9x+8)