Question

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Answer 1

Ответ:

х=1

у=-9

Объяснение:

6) 8х+7=27-12х

8х+12х=27-7

20х=20

х=1

7) 25+8у-(6у-4)=11

25+8у-6у+4=11

29+2у=11

2у=11-29

у=-9

Answer 2

Решение:

6.

$8x + 7 = 27 - 12x\\\\8x + 12 x = 27 - 7\\\\20x = 20\\\\x = 20 : 20\\\\x = 1$

в)

7.

$25 + 8y - (6y - 4) = 11\\\\25 + 8y - 6y + 4 = 11\\\\8y - 6y = 11 - 25 - 4\\\\2y = -18\\\\y = -18 : 2\\\\y = -9$

г)