Question

-4x+15=7x-18 И 6(-x+7)+13x=-14

Answer 1

Ответ:

-4х-7х=-18-15 ;

-11х=-33 ; х=3 ;

-6х+42+13х=-14;

7х+42=-14;

7х=-14-42 ;

7х=-56;х=-8.

Answer 2

Let's solve the two equations:

1. -4x + 15 = 7x - 18

First, we need to isolate the variable x.

Add 4x to both sides of the equation to get the x terms on one side:

15 = 11x - 18

Next, add 18 to both sides:

15 + 18 = 11x

33 = 11x

Now, divide both sides by 11 to solve for x:

x = 33 / 11 x = 3

So, the solution to the first equation is x = 3.

2. 6(-x + 7) + 13x = -14

Distribute the 6 on the left side of the equation:

-6x + 42 + 13x = -14

Combine like terms:

(13x - 6x) + 42 = -14

7x + 42 = -14

Now, subtract 42 from both sides:

7x = -14 - 42 7x = -56

Finally, divide both sides by 7 to solve for x:

x = -56 / 7 x = -8

So, the solution to the second equation is x = -8.