Question

15x-21=14x+20 напишите ответ пжл 18x+6=3+17x 5x+10-6x+12=5 9x+4x=-26

Answer 1

1) 15x - 21 = 14x + 20

15x - 14x = 20 + 21

x = 41

2) 18x + 6 = 3 + 17x

18x - 17x = 3 - 6

x = -3

3) 5x + 10 - 6x + 12 = 5

-x + 22 = 5

-x = 5 - 22

-x = -17

x = 17

4) 9x + 4x = -26

13x = -26

x = -2

Answer 2

Sure, let's solve each of these equations step by step:

1. 15x - 21 = 14x + 20

To solve for x, we need to isolate the variable on one side of the equation. Let's start by moving the x terms to one side and the constant terms to the other side:

15x - 14x = 20 + 21

Simplify:

x = 41

So the solution is x = 41.

2. 18x + 6 = 3 + 17x

Again, let's isolate the x terms on one side and the constant terms on the other side:

18x - 17x = 3 - 6

Simplify:

x = -3

So the solution is x = -3.

3. 5x + 10 - 6x + 12 = 5

Combine like terms:

(5x - 6x) + (10 + 12) = 5

Simplify:

-x + 22 = 5

Now, move the constant term to the other side:

-x = 5 - 22

Simplify:

-x = -17

To solve for x, multiply both sides by -1:

x = 17

So the solution is x = 17.

4. 9x + 4x = -26

Combine like terms:

13x = -26

Now, isolate x by dividing both sides by 13:

x = -26 / 13

Simplify:

x = -2

So the solution is x = -2.