Question

2.5 х +12=2х-13; 2помножить (2+х)+(4х-1)помножить 3 =10х-7

Answer 1

2.5х+12=2х-13

2.5х-2х=-13-12

0.5х=-25

х=-25/0.5

х=-50

...............................

4+2x+12x-3=10x-7

2x+12x-10x=-7+3-4

4x=-8

x=-2

Ответ: -2

Answer 2

Ответ:

Пошаговое объяснение:

1. 2,5х-2х=-12-13

0,5х=-25

х=-50

2. 4+2х+12х-3-10х+7=0

2х+12х-10х=3-7-4

4х=-8

х=-2

Answer 3

Let's solve the given equations step by step:

1. 2.5x + 12 = 2x - 13

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

2.5x - 2x = -13 - 12

Combine like terms:

0.5x = -25

Now, isolate x by dividing both sides by 0.5:

x = -25 / 0.5

x = -50

So the solution to the first equation is x = -50.

2. 2 * (2 + x) + (4x - 1) * 3 = 10x - 7

Start by simplifying the equation:

2 * (2 + x) + 3 * (4x - 1) = 10x - 7

Now, distribute the multiplication:

4 + 2x + 12x - 3 = 10x - 7

Combine like terms:

14x + 1 = 10x - 7

Now, move all the x terms to one side and constants to the other side:

14x - 10x = -7 - 1

4x = -8

Finally, isolate x by dividing both sides by 4:

x = -8 / 4

x = -2

So the solution to the second equation is x = -2.

To summarize:

1. For the first equation, x = -50.
2. For the second equation, x = -2.