7(х+2)=-14; 2(3х-4)=4(х-3); 5+3(2у-1)=2(у-3) ​

Решение и ответ:

7(x + 2) = -14

7x + 14 = -14

7x = -14 - 14

7x = -28

x = -28 ÷ 7

x = -4

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

6x - 8 = 4x - 12

6x - 4x = -12 + 8

2x = -4

x = -4 ÷ 2

x = -2

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

5 + 6y - 3 = 2y - 6

6y + 2 = 2y - 6

6y - 2y = -6 - 2

4y = -8

y = -8 ÷ 4

y = -2