Question

-12-(2х-5)=-3 -7х+31=-19-2х

Answer 1

Ответ:

12-2x+5=-3

-2x=-3-5-12

-2x=-20

-x=-10

x=10

-7x+2x=-19-31

-5x=-50

-x=-10

x=10

Пошаговое объяснение:

Answer 2

Let's solve the equations step by step:

1. -12 - (2x - 5) = -3

First, distribute the negative sign inside the parentheses:

-12 - 2x + 5 = -3

Next, combine like terms:

-7 - 2x = -3

Now, isolate the variable term (-2x) on one side by adding 7 to both sides:

-2x = -3 + 7

-2x = 4

Finally, divide both sides by -2 to solve for x:

x = 4 / -2

x = -2

So, the solution to the first equation is x = -2.

2. -7x + 31 = -19 - 2x

First, get all the x terms on one side by adding 7x to both sides:

-7x + 7x + 31 = -19 - 2x + 7x

Simplify:

31 = -19 + 5x

Next, get all the constant terms on one side by subtracting 31 from both sides:

31 - 31 = -19 - 31 + 5x

Simplify:

0 = -50 + 5x

Now, isolate the variable term (5x) on one side by adding 50 to both sides:

5x = 50

Finally, divide both sides by 5 to solve for x:

x = 50 / 5

x = 10

So, the solution to the second equation is x = 10.

Therefore, the solutions to the given system of equations are x = -2 and x = 10.