Question

Решите уравнение
3x+9=0

7x-4=x-16

6y+15=4y+17

Answer 1

1) 3x + 9 = 0
    3x = - 9
    x = -3
2) 7x - 4 = x - 16
    7x-x = -16+4
    6x = -12
    x = -2
3) 6y + 15 = 4y + 17
    6y - 4y = 17 - 15
    2y = 2
    y = 1