Question

В) -2x = 12 г) 3/7х = 9

Answer 1

А)-2х=12 /  *-1(домножаем на минус 1

2х=-12
х=-12/2
х=-6
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г) 3:7х=9
7х=3:9 (сокращаем)
7х=1:3
х=7:(1:3)
х=21

Answer 2

В) To solve the equation -2x = 12, we need to isolate the variable x on one side of the equation. We can do this by dividing both sides by -2:

-2x / -2 = 12 / -2

x = -6

Therefore, the solution to the equation -2x = 12 is x = -6.

г) To solve the equation 3/7x = 9, we need to isolate the variable x on one side of the equation. We can do this by multiplying both sides by the reciprocal of 3/7, which is 7/3:

(3/7x) * (7/3) = 9 * (7/3)

x = (63/21)

x = 3

Therefore, the solution to the equation 3/7x = 9 is x = 3.