Question

3) 3a - (10 + 5a) = 54; 6)3y-(y-19) = 2y; 9)15(x + 2)-30 =12x; 12) 6y-(y-1)=4+5y пж дам 50 баллов.​

Answer 1

3a - (10 + 5a) = 54

3a - 10 - 5a = 54

-2a = 64

a = -32

Ответ: a = -32

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3y - (y - 19) = 2y

3y - y + 19 = 2y

2y = 19

y = 9.5

Ответ: y = 9.5

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15(x + 2) - 30 = 12x

15x + 30 - 30 = 12x

3x = 0

x = 0

Ответ: x = 0

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6y - (y - 1) = 4 + 5y

6y - y + 1 = 4 + 5y

y + 1 = 4 + 5y

4y = -3

y = -0.75

Ответ: y = -0.75