Question

При каком значении переменной x значение выражения -2x−12 равно 7?

Answer 1

-2х-12= 7

-2х= 7+12

-2х= 19

-х= 9,5

х= -9,5

Answer 2

To find the value of variable x when the expression -2x - 12 equals 7, you can set up an equation and solve for x.

Step 1: Write the equation -2x - 12 = 7

Step 2: Isolate the variable x on one side of the equation. To do this, add 12 to both sides of the equation to get rid of the -12 on the left side. -2x - 12 + 12 = 7 + 12

Simplified equation: -2x = 19

Step 3: Now, to solve for x, divide both sides of the equation by -2: -2x / -2 = 19 / -2

Simplified equation: x = -19 / 2

So, when x is equal to -19/2 (or -9.5), the expression -2x - 12 is equal to 7.